Quartz from Midcontinent Rift, USA

Eye Agate

Dakota County, Minnesota, USA

Agate, etc.

Wolverine No. 2 shaft, Wolverine Mine, Wolverine, Calumet Township, Houghton County, Michigan, USA

Chalcedony, etc.

No. 21 shaft, Calumet & Hecla Mine, Calumet, Calumet Township, Houghton County, Michigan, USA

Agate, etc.

Wolverine No. 2 shaft, Wolverine Mine, Wolverine, Calumet Township, Houghton County, Michigan, USA

Eye Agate

Dakota County, Minnesota, USA

Agate, etc.

Wolverine No. 2 shaft, Wolverine Mine, Wolverine, Calumet Township, Houghton County, Michigan, USA

Chalcedony, etc.

No. 21 shaft, Calumet & Hecla Mine, Calumet, Calumet Township, Houghton County, Michigan, USA

Agate, etc.

Wolverine No. 2 shaft, Wolverine Mine, Wolverine, Calumet Township, Houghton County, Michigan, USA

Eye Agate

Dakota County, Minnesota, USA

Agate, etc.

Wolverine No. 2 shaft, Wolverine Mine, Wolverine, Calumet Township, Houghton County, Michigan, USA

Chalcedony, etc.

No. 21 shaft, Calumet & Hecla Mine, Calumet, Calumet Township, Houghton County, Michigan, USA

Agate, etc.

Wolverine No. 2 shaft, Wolverine Mine, Wolverine, Calumet Township, Houghton County, Michigan, USA


USA
Iowa ⓘ Bremer County	[Chalcedony var. Agate] Paul J.Horick (1974) The Minerals of iowa Iowa Geological Survey Educational Series 2
Butler County ⓘ Aplington quarry	Smith, Arthur E., Prior, Harold L. (2002) Iowa Mineral Locality Index. Rocks & Minerals, 77 (6) 404-413 doi:10.1080/00357529.2002.9924893
ⓘ Shell Rock	[Chalcedony var. Agate] Smith, Arthur E., Prior, Harold L. (2002) Iowa Mineral Locality Index. Rocks & Minerals, 77 (6) 404-413 doi:10.1080/00357529.2002.9924893
Floyd County ⓘ Little Cedar River	[Chalcedony var. Agate] Smith, Arthur E., Prior, Harold L. (2002) Iowa Mineral Locality Index. Rocks & Minerals, 77 (6) 404-413 doi:10.1080/00357529.2002.9924893
Franklin County ⓘ Chapin	Smith, Arthur E., Prior, Harold L. (2002) Iowa Mineral Locality Index. Rocks & Minerals, 77 (6) 404-413 doi:10.1080/00357529.2002.9924893
Hamilton County ⓘ Ellsworth	[Chalcedony var. Agate] MacFall, P.M. (1951) Gem Hunter's Guide (1st ed.). Science and Mathematics Publishing Company, 187 pages.
ⓘ Randall	Smith, Arthur E., Prior, Harold L. (2002) Iowa Mineral Locality Index. Rocks & Minerals, 77 (6) 404-413 doi:10.1080/00357529.2002.9924893
Hardin County ⓘ Eldora-Union area	Smith, Arthur E., Prior, Harold L. (2002) Iowa Mineral Locality Index. Rocks & Minerals, 77 (6) 404-413 doi:10.1080/00357529.2002.9924893
ⓘ Steamboat Rock area	Smith, Arthur E., Prior, Harold L. (2002) Iowa Mineral Locality Index. Rocks & Minerals, 77 (6) 404-413 doi:10.1080/00357529.2002.9924893
Marshall County ⓘ Marshalltown	[Chalcedony var. Agate] Rocks&Min. 20:480.
ⓘ Montgomery County	Ransom, Jay Ellis (1974) Gems and Minerals of America - A Guide to Rock Collecting. Harper & Row.
ⓘ Red Oak area quarries	[Chalcedony var. Agate] Ransom, Jay Ellis (1974) Gems and Minerals of America - A Guide to Rock Collecting. Harper & Row.
Pocahontas County ⓘ Manson impact structure	Kring, D. A. (2000) Impact-Induced Hydrothermal Activity and Potential Habitats for Thermo- Philic and Hyperthermophilic Life. Catastrophic Events Conference.
ⓘ Polk County	Kelly Nash Coll. (personally collected)
ⓘ Story County	Ransom, Jay Ellis (1974) Gems and Minerals of America - A Guide to Rock Collecting. Harper & Row.
ⓘ Ames area	[Chalcedony] Ransom, Jay Ellis (1974) Gems and Minerals of America - A Guide to Rock Collecting. Harper & Row.
Webster County Fort Dodge ⓘ Celotex Corporation mine	Smith, Arthur E., Prior, Harold L. (2002) Iowa Mineral Locality Index. Rocks & Minerals, 77 (6) 404-413 doi:10.1080/00357529.2002.9924893
ⓘ Georgia Pacific Corporation mine	Smith, Arthur E., Prior, Harold L. (2002) Iowa Mineral Locality Index. Rocks & Minerals, 77 (6) 404-413 doi:10.1080/00357529.2002.9924893
ⓘ National Gypsum mine	Smith, Arthur E., Prior, Harold L. (2002) Iowa Mineral Locality Index. Rocks & Minerals, 77 (6) 404-413 doi:10.1080/00357529.2002.9924893
ⓘ U. S. Gypsum mine	Smith, Arthur E., Prior, Harold L. (2002) Iowa Mineral Locality Index. Rocks & Minerals, 77 (6) 404-413 doi:10.1080/00357529.2002.9924893
Kansas ⓘ Clay County	[Chalcedony] Kenneth L. Walters and Charles K. Bayne, Geology and Ground-water Resources of Clay County, Kansas, Kansas Geological Survey Bulletin 136, 1959.
ⓘ Cloud County	[Chalcedony var. Agate] Ransom, Jay Ellis (1974) Gems and Minerals of America - A Guide to Rock Collecting. Harper & Row.
Michigan Alger County ⓘ Grand Marais	[Agate var. Lake Superior Agate] Yalmer Primeau collection
ⓘ Lake Superior beaches	[Chalcedony var. Agate] Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
Pictured Rocks National Lakeshore ⓘ Grand Sable Dunes	[Chalcedony var. Agate] Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
Baraga County Huron River ⓘ Huron River Uranium prospect (Unnamed V prospect; MRDS - 10171055)	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
Chippewa County ⓘ Lake Superior beaches	[Chalcedony var. Agate] Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
Trout Lake Township ⓘ Unnamed quarry	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Gogebic County	www.deq.state.mi.us/documents/deq-glm-rcim-geology-Minerals_Found_In_Michigan.Pdf.
Black River Harbor ⓘ Black River Harbor Beach	[Agate var. Lake Superior Agate] Brian Cowger
Gogebic iron range Bessemer ⓘ Geneva Mine (Geneva-Davis Mine)	Rocks & Min.: 23:717
ⓘ Powdermill Creek	[var. Milky Quartz] Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
Ironwood ⓘ Newport Mine (Bonnie Mine)	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
Marenisco ⓘ Copps Mine	Carlson, Shawn M., Fountain, Daniel R., Laughlin-Yurs, Cullen, Mills, Owen P., Olds, Travis A. (2007) Secondary Lead Minerals from the Copps Mine, Gogebic County, Michigan. Rocks & Minerals Vol. 92, No. 2, 166-171 USGS Geological Investigation Series I2606
ⓘ Ironwood iron formation	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
Ramsay ⓘ Eureka-Asteroid Mine (Eureka Mine)	Morris Jr., T. (1983) Michigan Mineralogy: A Locality Index. Rocks & Minerals: 58(3): 108.
Wakefield ⓘ Sunday Lake Group Mines	[var. Smoky Quartz] Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ United States Metals Refining Company exploration (Copperwood Mine)	Copperwoood Mine Orvana Resources US Corp. Mine Permit Application
Gratiot County Ithaca ⓘ Michigan Basin Deep Drill Hole	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
Houghton County Adams Township Baltic ⓘ Atlantic Section 16 Exploration Prospect	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Baltic Mine	Buchholz, T.W., Falster, A.U., Simmons, W.B. (2010) New Data on Minerals from the Keeweenaw copper district, MI. The 37th Rochester Mineralogical Symposium, April 15-18, 2010 Morris Jr., T. (1983) Michigan Mineralogy: A Locality Index. Rocks & Minerals: 58(3): 109.
ⓘ Baltic No. 2 shaft	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
Champion Mine ⓘ Champion Mine	USGS PP144
Painesdale ⓘ Globe Mine	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
Trimountain ⓘ Trimountain Mine	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
Calumet Township Calumet ⓘ Calumet & Hecla Mine	Rocks & Min.:58:109 & 64:150.
ⓘ No. 1 shaft	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ No. 21 shaft	[Chalcedony var. Agate] Rosemeyer, T. 2011 New from the Keweenaw: Part 4 - Recent Mineral Finds in Michigan's Copper Country. Rocks & Minerals 86:205-227
ⓘ Red Jacket Shaft	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
Centennial Heights ⓘ Centennial Mine	Morris Jr., T. (1983) Michigan Mineralogy: A Locality Index. Rocks & Minerals: 58(3): 109.
ⓘ No. 2 shaft	Rosemeyer, T. (2007) The Kearsarge: Copper-bearing Amygdaloidal Lode. Houghton and Keweenaw Counties, Michigan. Rocks & Minerals: 82(4): 276-297.
ⓘ Tamarack Junior Mine (Tamarack Jr. Mine)	(2005) Mineral Resources Data System (MRDS), US Geological Survey. USGS PP144
Kearsarge ⓘ Kearsarge Mine	Rocks & Min.: 21:664.
ⓘ North Kearsarge Mine	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ South Kearsarge Mine	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
Osceola ⓘ Osceola Mine	Morris Jr., T. (1983) Michigan Mineralogy: A Locality Index. Rocks & Minerals: 58(3): 109.
ⓘ No. 3 shaft	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ No. 4 shaft	Yalmer Primeau collection
ⓘ Tamarack Waterworks Beach	[Chalcedony var. Agate] Yalmer Primeau collection
Wolverine ⓘ Wolverine Mine	Rocks & Min.: 13:137.
ⓘ Wolverine No. 2 shaft	Rocks & Minerals (2007) 82:294 Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
Elm River Township Twin Lakes ⓘ Elm River Mine	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Shawmut Mine	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
Winona ⓘ King Philip Mine	USGS PP144
ⓘ Winona Mine	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
Wyandotte ⓘ Wyandotte Mine	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
Franklin Township Boston ⓘ Franklin Jr. Mine (Albany & Boston; Peninsula)	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Rhode Island Mine	USGS PP144
ⓘ Saint Mary's Mine	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
Franklin Mine ⓘ Franklin Mine	Morris Jr., T. (1983) Michigan Mineralogy: A Locality Index. Rocks & Minerals: 58(3): 109.
ⓘ Mesnard Mine (Quincy No. 8 shaft)	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ New Baltic Exploration prospect	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
Pewabic ⓘ Pewabic Mine	USGS PP144
Ripley ⓘ New Arcadian Exploration	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Ripley Exploration Prospect	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
Hancock Township Sevenmile Creek ⓘ Unnamed Copper Prospect (MRDS - 10146303)	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
Hancock ⓘ Glacial till	[Chalcedony var. Agate] Yalmer Primeau collection
ⓘ Hancock Mine	Morris Jr., T. (1983) Michigan Mineralogy: A Locality Index. Rocks & Minerals: 58(3): 109.
Houghton ⓘ Huron Creek occurrences	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
Isle Royal Mines ⓘ Isle Royal No. 1 shaft	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Naumkeag Mine	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Portage Mine (Grand Portage Mine)	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Sheldon-Columbian Mine
Osceola Township ⓘ La Salle Mine	[Chalcedony var. Agate] Larry Maltby, based on recent collecting by Tom Rosemeyer at the La Salle Mine.
ⓘ Laurium Mine	Morris Jr., T. (1983) Michigan Mineralogy: A Locality Index. Rocks & Minerals: 58(3): 109.
ⓘ Oneco Exploration prospect	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Osceola Amygdaloid	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Tamarack	USGS PP144
ⓘ Tamarack Mine	Morris Jr., T. (1983) Michigan Mineralogy: A Locality Index. Rocks & Minerals: 58(3): 109.
Portage Township ⓘ Isle Royal Mines	Morris Jr., T. (1983) Michigan Mineralogy: A Locality Index. Rocks & Minerals: 58(3): 109.
ⓘ Isle Royal No. 4 shaft	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Isle Royal No. 5 shaft	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Isle Royal No. 6 shaft	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
Superior ⓘ Houghton Exploration prospect	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Superior Mine (Old Superior Mine)	USGS PP144
Schoolcraft Township ⓘ Big Traverse Beach	[Chalcedony var. Agate] Yalmer Primeau collection
ⓘ Calumet & Hecla 1937 Exploration Shaft	Bornhorst T.J. Barron R. J. (2013) Geologic Overview of the Keweenaw Peninsula, Michigan, Institute on Lake Superior Geology.
ⓘ Mayflower Old Colony Mine	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Old Colony Exploration Prospect	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ St. Louis Mine Exploration	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Keweenaw Copper Mining District	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
Keweenaw County Allouez Township Ahmeek ⓘ Ahmeek Mine	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Ahmeek No. 1 Shaft	Rosemeyer, T. (2022). News from the Keweenaw: Part 5—Recent Mineral Finds in Michigan’s Copper Country: Twenty-ninth in a series of articles on the mines and minerals of Michigan’s Copper Country. Rocks & Minerals, 97(4), 354-363.
ⓘ Ahmeek No. 3 Shaft	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Ahmeek No. 4 Shaft	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Arsenide Fissure	USGS PP144
ⓘ Mass Fissure	(2005) Mineral Resources Data System (MRDS), US Geological Survey. USGS PP144
Allouez ⓘ Allouez Mine	Morris Jr., T. (1983) Michigan Mineralogy: A Locality Index. Rocks & Minerals: 58(3): 111.
ⓘ Allouez No. 1 Mine	Rosemeyer, T. (2007) The Kearsarge: Copper-bearing Amygdaloidal Lode. Houghton and Keweenaw Counties, Michigan. Rocks & Minerals: 82(4): 276-297.
ⓘ Black Creek	[Chalcedony var. Agate] Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Cliff Mine	Morris Jr., T. (1983) Michigan Mineralogy: A Locality Index. Rocks & Minerals: 58(3): 111, 121. Palache, Charles, Berman, Harry, Frondel, Clifford (1951) The System of Mineralogy (7th ed.) Vol. 2 - Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Ect. John Wiley and Sons, New York. Henwood, W.J. (1871) Observations on Metalliferous Deposits: On the Native Copper of Lake Superior. Transactions of the Royal Geological Society of Cornwall 8(1): 385-489. Rocks & Minerals 84, 298-323.
ⓘ Five Mile Point	[Chalcedony var. Agate] Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Gratiot River	Yalmer Primeau collection
Mohawk ⓘ Mohawk Mine	Rocks & Min.: 21:664 58:111.
ⓘ Mohawk No. 5 shaft	Yalmer F Primeau
ⓘ Mohawk No. 6 shaft	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ North American Mine	Henwood, W.J. (1871) Observations on Metalliferous Deposits: On the Native Copper of Lake Superior. Transactions of the Royal Geological Society of Cornwall 8(1): 385-489.
Ojibway ⓘ Manhattan Exploration Prospect	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Ojibway Mine	Rosemeyer, T. (2011) New from the Keweenaw: Part 4 - Recent Mineral Finds in Michigan's Copper Country. Rocks & Minerals: 86(3): 205-227 Rocks & Min.: 58:111 73:3 p189-190
Seneca ⓘ Iroquois Mine	Morris Jr., T. (1983) Michigan Mineralogy: A Locality Index. Rocks & Minerals: 58(3): 111.
Seneca Mine ⓘ Old Seneca Mine (Seneca No. 4 Shaft)	Tom Rosemeyer, pers. comm.
ⓘ Seneca No. 1 Shaft	Morris Jr., T. (1983) Michigan Mineralogy: A Locality Index. Rocks & Minerals: 58(3): 111.
ⓘ Seneca No. 2 shaft (Gratiot Mine)	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Seven Mile Point	[Chalcedony var. Agate] Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Seven Mile Point Beach	[Agate var. Lake Superior Agate] Brian Cowger
ⓘ Silver Creek	[Chalcedony var. Agate] Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ South Cliff Mine	Visual identification by Jim Gawura
Eagle Harbor ⓘ Agate Harbor	[Chalcedony var. Agate] Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Brockway Mountain (West Bluff)	[Chalcedony var. Agate] Paul Brandes field observation
ⓘ Connecticut Mine	Rosemeyer, T. (2022). News from the Keweenaw: Part 5—Recent Mineral Finds in Michigan’s Copper Country: Twenty-ninth in a series of articles on the mines and minerals of Michigan’s Copper Country. Rocks & Minerals, 97(4), 354-363.
Copper Falls ⓘ Copper Falls Mine	USGS PP144
Owl Creek Fissure Mine ⓘ Thomas Shaft	Frank Karasti
ⓘ Owl Creek	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Petherick Mine	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Eagle Harbor Marina	Yalmer Primeau collection
ⓘ Lakeshore traps	[Chalcedony var. Agate] Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp. Larry Maltby
ⓘ Washington Mine
Grant Township ⓘ Aetna Exploration Copper Mine	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
Bete Grise ⓘ Bete Grise Bay	[Chalcedony var. Agate] Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ G-2 Prospect	Tom Rosemeyer collection.
ⓘ Copper Harbor	[Chalcedony var. Agate] Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Clark Mine	Rosemeyer, T. (2009) Copper-bearing Fissure Veins, Keweenaw County, Michigan, Lake Superior Native Copper District. Rocks & Minerals: 84(4): 298-323. Rocks & Min.: 21:664 58:111.
ⓘ Horseshoe Harbor	[var. Amethyst] Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
Manganese Mine ⓘ Lake Manganese Vein	Allan Blaske collection
Mosquito Mining District ⓘ Cape Mine	Rosemeyer, T. (2009) Copper-bearing Fissure Veins, Keweenaw County, Michigan, Lake Superior Native Copper District. Rocks & Minerals: 84(4): 298-323. R&M 78:3 p180
ⓘ Hard Rock fissure	Rosemeyer, T. (2009) Copper-bearing Fissure Veins, Keweenaw County, Michigan, Lake Superior Native Copper District. Rocks & Minerals: 84(4): 298-323.
ⓘ Iron City Mine (Empire Mine)	Rosemeyer, Tom (2003) The Occurrence of Porcelaneous Datolite in Michigan's Lake Superior Copper District. Rocks & Minerals, 78 (3) 170-188 doi:10.1080/00357529.2003.9926717
ⓘ High Rock Bay	Yalmer Primeau collection
ⓘ Keweenaw Point	[var. Amethyst] Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
Lac La Belle ⓘ Lac La Belle exploration	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
Mount Bohemia ⓘ Mount Bohemia Mine	Institute on Lake Superior Geology Proceedings, 40th Annual Meeting, Houghton, MI, v. 40, part 4,
Mandan ⓘ Mandan Mine	Yalmer F Primeau
ⓘ Medora Mine	[var. Milky Quartz] Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Resolute Mine	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ New York and Michigan Exploration	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Point Prospect	Rosemeyer, T. (2009) Copper-bearing Fissure Veins, Keweenaw County, Michigan, Lake Superior Native Copper District (Part 1). Rocks & Minerals, 84:4, 298-306. Rosemeyer, T. (2009) Copper-bearing Fissure Veins, Keweenaw County, Michigan, Lake Superior Native Copper District (Part 2). Rocks & Minerals, 84(4), 307-319. Rosemeyer, T. (2009) Copper-bearing Fissure Veins, Keweenaw County, Michigan, Lake Superior Native Copper District (Part 3). Rocks & Minerals, 84:4, 320-323.
ⓘ Vulcan Exploration Copper Mine	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
Houghton Township Central ⓘ Central Mine	Rosemeyer, T. (2009) Copper-bearing Fissure Veins, Keweenaw County, Michigan, Lake Superior Native Copper District. Rocks & Minerals: 84(4): 298-323. Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Northwestern Mine	Rosemeyer, T. (2009) Copper-bearing Fissure Veins, Keweenaw County, Michigan, Lake Superior Native Copper District. Rocks & Minerals: 84(4): 298-323.
Eagle River ⓘ Eagle River	[Chalcedony var. Agate] Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Eagle River shoals	Bornhorst, T.J., Barron, R.J. (2011) Copper deposits of the western Upper Peninsula of Michigan. The Geological Society of America Field Guide 24: 83-99.
Phoenix ⓘ Lake Superior Mine (Old Phoenix Fissure)	Yalmer F Primeau
ⓘ Meadow Mine	Henwood, W.J. (1871) Observations on Metalliferous Deposits: On the Native Copper of Lake Superior. Transactions of the Royal Geological Society of Cornwall 8(1): 385-489.
ⓘ Phoenix Mine	Tschernich, Rudy W. (1992) Zeolites of the World. Geoscience Press, Inc., Phoenix, Arizona. 567pp. Morris Jr., T. (1983) Michigan Mineralogy: A Locality Index. Rocks & Minerals: 58(3): 111.
ⓘ Robbins Mine (West Vein Mine)	Rosemeyer, T. (2009) Copper-bearing Fissure Veins, Keweenaw County, Michigan, Lake Superior Native Copper District. Rocks & Minerals: 84(4): 298-323. Personal observation- Jim Daly
ⓘ St. Clair Mine	self collected on 8-2004
ⓘ Suffolk Exploration	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
Isle Royale National Park ⓘ Agate Beach	[Chalcedony var. Agate] Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Caribou Islands	[Chalcedony var. Agate] Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Carnelian Beach	[Chalcedony var. Agate] Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Conglomerate Bay	[Chalcedony var. Agate] Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Island Mine	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Senter Point	[Chalcedony var. Agate] Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Siskiwit Bay	[Chalcedony var. Agate] Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Tobin Harbor	[Chalcedony var. Agate] Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Portage Lake Volcanics	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Silver vein	Rosemeyer, T. 2011 New from the Keweenaw: Part 4 - Recent Mineral Finds in Michigan's Copper Country. Rocks & Minerals 86:205-227
Livingston County ⓘ Winans Lake fulgurite	Essene, E.J., Fisher, D.C. (1986): Lightning Strike Fusion: Extreme Reduction and Metal-Silicate Liquid Immiscibility. Science: 234(4773): 189-193
Luce County ⓘ Lake Superior beaches	[Chalcedony var. Agate] Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
Mackinac County Brevort ⓘ Plateau Site	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
Marquette County ⓘ Adams Mine	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
Big Bay ⓘ Kona Dolomite	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Breitung - Hematite Mine (New York Hematite Mine)	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Buschell Lake	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Carr Mine (New Mexican)	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Chicago prospect (East Chicago Forty)	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Cliffs Arctic Reserve prospect	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Dead River	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Dead River Basin	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Unnamed Pb-Zn prospect (1)	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Enchantment Lake	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Forest City prospect	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Harvey	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Himrod prospect (Orion)	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
Huron Mountains ⓘ Mount Homer	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
Ishpeming Greenstone belt (Marquette Greenstone belt) ⓘ Alger Gold prospect	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ B & M gold prospect (Billings Mine; Ten Kilns Mine)	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Clark Creek region	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Daniel Section 30 gold prospect (Cap Daniel's Mine; Captain Daniel's mine)	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Fire Center Mine	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Crescent Gold prospect	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Gold Bluff prospect	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
Ishpeming ⓘ Cleveland Lake Group (Lake Mine)	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Cleveland Mine	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Cliffs Shaft Mine (Barnum; Lake Superior Group; Section 10 Exploration; Bancroft; Moro mine)	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Detroit Mine (Norwich Mine)	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Jasper Hill (Jasper Knob)	www.marquette.org/Travel/rockhounding.htm
ⓘ Lake Angeline Mine (East End; Angeline)	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Lake Superior Mine (Hematite; Section 10 exploration; Holmes-Section 16; Hard Ore; Section 21)	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Moro Mine (Cliffs Shaft; Cleveland Mine)	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Ogden Mine	Morris Jr., T. (1983) Michigan Mineralogy: A Locality Index. Rocks & Minerals: 58(3): 112.
ⓘ Tilden Mine (Cliff Drives III; Tilden Pit)	Morris Jr., T. (1983) Michigan Mineralogy: A Locality Index. Rocks & Minerals: 58(3): 112.
ⓘ Lake Sally Reserve prospect (Iron Mountain; Iron Mountain Lake)	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Lucky Star Reserve prospect (Athens)	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
Marquette ⓘ Old airport	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Unnamed locality	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Moore Mine (Laxey; Mesabi's Friend; Royal; Gibbon; Consolidated; Gribben)	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
Negaunee ⓘ Athens Mine	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Barasa Mine (Barasa prospect)	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Bunker Hill Mine	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Cambria-Jackson Mine (Cambria Mine; incl. Hartford Mine; Lakeside property; Lillie Mine [Bessemer Mine])	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ County Road 480 roadcut	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Enchantment Lake formation	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Goose Lake	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
Goose Lake area ⓘ Lindberg Quarry	Morris Jr., T. (1983) Michigan Mineralogy: A Locality Index. Rocks & Minerals: 58(3): 111.
Goose Lake ⓘ Grace Lake	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Unnamed aplite	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Holyoke Mine	Morris Jr., T. (1983) Michigan Mineralogy: A Locality Index. Rocks & Minerals: 58(3): 111.
ⓘ Jackson Mine (South Jackson pit)	Morris Jr., T. (1983) Michigan Mineralogy: A Locality Index. Rocks & Minerals: 58(3): 112.
ⓘ Lackawanna Mine (East Buffalo; Sam Mitchell; Section 5; Delaware & Lackawanna)	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Maas Mine (Race Course)	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Mary Charlotte Mine (Bay State; Star; Allen; East Chicago Forty; Himrod; Ada; Orion)	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
Mather Mine (Pioneer pellet plant; Ore improvement plant) ⓘ Mather A shaft	Yalmer Primeau collection
ⓘ McComber Mine (Lucy Mine; Pendill; East Jackson)	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Milwaukee-Davis Mine (Milwaukee; Davis; Wheeling; Grand Rapids)	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Mona schist	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Negaunee Mine	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ North Jackson pit	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Pine Hill Quarry	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Rolling Mill Mine (Chester; Kruse Open Pit)	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Unnamed railroad cut	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ US highway 41 roadcut	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
Palmer ⓘ Ajibik quartzite	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Empire Mine	[var. Amethyst] Morris Jr., T. (1983) Michigan Mineralogy: A Locality Index. Rocks & Minerals: 58(3): 111.
ⓘ Isabella Mine (Watson)	Betts, John (n.d.) John Betts website listing.
ⓘ New Richmond pit	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Platt Mine	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Richmond Mine (New Richmond)	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Richmond Mine (Old Richmond)	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Volunteer (Old) Mine (Cascade; Palmer; Emma; Old Volunteer; West End; Maitland Shaft; Maitland-Volunteer; Howe)	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Volunteer Mine (Maitland-Volunteer; New Volunteer)	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Partridge Island	[Chalcedony var. Agate] Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Pings-Case prospect	Reed, R. C. (1967a) Copper mineralization in Animikie sediments of the eastern Marquette Range, Michigan (abstract). 13th Annual Institute Lake Superior Geology, 34-35.
ⓘ Pioneer Mine	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Pontiac prospect	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Richards prospect	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Rowland prospect (Iron Cliffs)	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Sauk Head	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Section 12 Mine (Iron Cliffs)	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Sedgewick Mine	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Silver Lead mine	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Unnamed locality	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Wicks prospect (Wick)	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
Monroe County Berlin Charter Township Newport ⓘ Holloway Quarry
ⓘ Newport Quarry	Rocks & Min.: 58: 108.
ⓘ Unnamed quarry	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Oakland County	Yalmer Primeau collection
ⓘ Ontonagon County	Ransom, Jay Ellis (1974) Gems and Minerals of America - A Guide to Rock Collecting. Harper & Row.
ⓘ Algonquin Mine (Pennsylvania Mine)	Henwood, W.J. (1871) Observations on Metalliferous Deposits: On the Native Copper of Lake Superior. Transactions of the Royal Geological Society of Cornwall 8(1): 385-489.
ⓘ Cleveland Mine	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Collins Mine	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Echo Lake Intrusion	Koerber, Alexander J., (2018) "Geochemical and Petrological Investigation of the Prospective Ni-Cu-Pge Mineralization at the Echo Lake Intrusion in the Upper Peninsula of Michigan, USA". Master's Theses. 3416.
ⓘ Evergreen Series (Evergreen Lodes)	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Flintsteel River Mine	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
Greenland Township Greenland ⓘ Adventure mine	Morris Jr., T. (1983) Michigan Mineralogy: A Locality Index. Rocks & Minerals: 58(3): 112. Rosemeyer, T. (1990) Through the Scope: Microminerals of the Caledonia Mine Ontonagon County, Michigan. Rocks & Minerals: 65(3): 240.
Winona ⓘ Cherokee Mine (Cherokee Penn Mine; Dunn Mine)	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Firesteel Mine	Henwood, W.J. (1871) Observations on Metalliferous Deposits: On the Native Copper of Lake Superior. Transactions of the Royal Geological Society of Cornwall 8(1): 385-489.
ⓘ Henwood Mine (Douglass Houghton Mine)	Henwood, W.J. (1871) Observations on Metalliferous Deposits: On the Native Copper of Lake Superior. Transactions of the Royal Geological Society of Cornwall 8(1): 385-489.
ⓘ Indiana Mine	Henwood, W.J. (1871) Observations on Metalliferous Deposits: On the Native Copper of Lake Superior. Transactions of the Royal Geological Society of Cornwall 8(1): 385-489.
ⓘ What Cheer Mine	Henwood, W.J. (1871) Observations on Metalliferous Deposits: On the Native Copper of Lake Superior. Transactions of the Royal Geological Society of Cornwall 8(1): 385-489.
ⓘ Gull Point	[Chalcedony var. Agate] MacFall, P.M. (1951) Gem Hunter's Guide (1st ed.). Science and Mathematics Publishing Company, 187 pages.
ⓘ Lake Superior Mine	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
Mass City ⓘ Algomah Mine	(2005) Mineral Resources Data System (MRDS), US Geological Survey. Morris Jr., T. (1983) Michigan Mineralogy: A Locality Index. Rocks & Minerals: 58(3): 112.
ⓘ Belt Mine (Piscatauqua)	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Caledonia Mine	Rosemeyer, T. (1990) Through the Scope: Microminerals of the Caledonia Mine Ontonagon County, Michigan. Rocks & Minerals: 65(3): 240-243.. Huizing, M.E. (1988) Museum Notes and Announcements. Rocks & Minerals: 63(6): 494. Ref.: Morris Jr., T. (1983) Michigan Mineralogy: A Locality Index. Rocks & Minerals: 58(3): 112.
ⓘ Evergreen Bluff Mine	MWminerals photo
ⓘ Flintsteel Mine (Nassau Mine; Old Flintsteel Mine; Superior-Nassau Superior Mine)	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Lake Mine (Great Western Mine; Bohemian)	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Mass Consolidated Mine	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Mass Mine	Morris Jr., T. (1983) Michigan Mineralogy: A Locality Index. Rocks & Minerals: 58(3): 112. Rosemeyer, T. (1990) Through the Scope: Microminerals of the Caledonia Mine Ontonagon County, Michigan. Rocks & Minerals: 65(3): 240.
ⓘ Ridge Mine	Paul Brandes field observation Yalmer Primeau collection
ⓘ Nebraska Mine	Larry Maltby
ⓘ Old Algomah Mine	Allan Blaske collection
ⓘ Old Mass Mine	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ South Lake Mine (Aztec Mine)	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Toltec Mine	Henwood, W.J. (1871) Observations on Metalliferous Deposits: On the Native Copper of Lake Superior. Transactions of the Royal Geological Society of Cornwall 8(1): 385-489.
ⓘ North Lake Mine	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
Norwich ⓘ Norwich Mine (Essex Mine)	Dana 6: 520.
ⓘ Onondaga Exploration	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
Ontonagon ⓘ Lake Superior beaches	[Chalcedony var. Agate] Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Porcupine Mountains	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
ⓘ Carp Lake Mine	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Cuyahoga Mine	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Lafayette Mine	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
Rockland ⓘ Bumblebee Mine	Yalmer Primeau field observations
ⓘ Michigan Mine	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Minesota Mine	Rosemeyer, T. (2001) The Copper-Bearing Conglomerate Lodes of the Michigan Copper Country. Rocks & Minerals: 76(3): 156-188.
ⓘ National Mine	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Rockland Mine	Henwood, W.J. (1871) Observations on Metalliferous Deposits: On the Native Copper of Lake Superior. Transactions of the Royal Geological Society of Cornwall 8(1): 385-489.
Silver City ⓘ Ontonagon Silver Mine	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Scranton Mine	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ Unnamed locality	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
Victoria ⓘ Victoria Mine (Cushin Mine)	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
White Pine ⓘ Nonesuch Mine	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ White Pine Extension Mine (Pinex Mine)	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
ⓘ White Pine Mine	Heinrich, E. Wm. (1976) The Mineralogy of Michigan. Bulletin 6 (1st ed.) Michigan Geological Survey Division
Wayne County Detroit ⓘ Detroit Salt Company Mine (International Salt Company Mine)	Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
Rockwood ⓘ Ottawa Silica Company Quarry (Rockwood Quarry)	Morris Jr., T. (1983) Michigan Mineralogy: A Locality Index. Rocks & Minerals: 58(3): 108.
Wexford County Harrietta ⓘ Wexford Sand Company	(2005) Mineral Resources Data System (MRDS), US Geological Survey.
Minnesota Carlton County ⓘ Arrowhead mine (Uranium Prospect No. 1)	Econ Geol (1986) 81:173-183 Econ Geol (1985) 80:1425-1435
Chisago County ⓘ Taylor's Falls	Craddock, C. (1972) Keweenawan geology of east-central Minnesota and southeastern Minnesota in P.K. Sims and G.B. Morey, editors, Geology of Minnesota: a centennial volume: 416-430
ⓘ Cook County	[Agate var. Lake Superior Agate] Ransom, Jay Ellis (1974) Gems and Minerals of America - A Guide to Rock Collecting. Harper & Row.
Schroeder ⓘ Cross River	Mike Hedtke (2000) Mineral News, 16, #4, 1-7.
Tofte ⓘ Bluefin Bay	[Agate var. Lake Superior Agate] Brian Cowger
ⓘ Goodhue County	[Agate var. Lake Superior Agate] Ransom, Jay Ellis (1974) Gems and Minerals of America - A Guide to Rock Collecting. Harper & Row.
ⓘ Hennepin County	[Agate var. Lake Superior Agate] Ransom, Jay Ellis (1974) Gems and Minerals of America - A Guide to Rock Collecting. Harper & Row.
Lake County Beaver Bay Beaver Bay Complex ⓘ Sonju Lake intrusion	Chusi Li, Ripley, E.M., Oberthür, T., Miller, Jr., J.D., and Joslin, G.D. (2008): Mineralium Deposita 43, 97-110.
ⓘ Illgen City	Bill Morgenstern - collected location
ⓘ Silver Bay	[Agate var. Lake Superior Agate]
ⓘ Two Harbors	[Chalcedony var. Agate] Ojakangas, R. W. and Matsch, C. L. (1982): Minnesota's Geology. U of Minnesota Press. 255p
ⓘ Agate Bay	[Chalcedony var. Agate]
ⓘ Burlington Bay	[Chalcedony var. Agate] Green, J. C. (1987). Plateau basalts of the Keweenawan North Shore Volcanic Group. Geol. Soc. Am. Centennial Field Guide—North-Central Section, 59-62. Ojakangas, R. W. and Matsch, C. L. (1982): Minnesota's Geology. U of Minnesota Press. 255p
ⓘ Flood Bay	[Chalcedony var. Agate] Roadside Geology of Minnesota (2009) Ojakangas, R.W.
ⓘ Olmsted County	[Agate var. Lake Superior Agate] Ransom, Jay Ellis (1974) Gems and Minerals of America - A Guide to Rock Collecting. Harper & Row.
Pine County ⓘ Kettle River	[Chalcedony var. Agate] Yalmer Primeau collection
St. Louis County Duluth ⓘ Brighton Beach	[Agate var. Lake Superior Agate] Brian Cowger
ⓘ Lester Park	Edith Trybalski
ⓘ Knife River	Rocks & Minerals 81:136-140
ⓘ Lakeside Lavas	R. Peter Richards Collection
Winona County ⓘ Bronk Quarry and Mill	William S. Cordua
Nebraska Cass County ⓘ Eagle	[Agate var. Lake Superior Agate] Pabian, Roger K. (1971) The Minerals and Gemstones of Nebraska. Educational Circular 2. University of Nebraska - Conservation and Survey Divsion
ⓘ Union	[Agate var. Lake Superior Agate] Pabian, Roger K. (1971) The Minerals and Gemstones of Nebraska. Educational Circular 2. University of Nebraska - Conservation and Survey Divsion
ⓘ Weeping Water	[Agate var. Lake Superior Agate] Pabian, Roger K. (1971) The Minerals and Gemstones of Nebraska. Educational Circular 2. University of Nebraska - Conservation and Survey Divsion
Gage County ⓘ Beatrice	Pabian, Roger K. (1971) The Minerals and Gemstones of Nebraska. Educational Circular 2. University of Nebraska - Conservation and Survey Divsion
ⓘ Seitz Quarry	Collected, K. Nash, 2000
ⓘ Behrens Quarry (Hill Quarry)	Kelly Nash Collection
ⓘ Holmesville	Pabian, Roger K. (1971) The Minerals and Gemstones of Nebraska. Educational Circular 2. University of Nebraska - Conservation and Survey Divsion
Odell ⓘ Diamond Lake Barite occurrence ("Odell Diamond" locality)	Pabian, Roger K. (1971) The Minerals and Gemstones of Nebraska. Educational Circular 2. University of Nebraska - Conservation and Survey Divsion
ⓘ Wymore	[var. Amethyst] Pabian, Roger K. (1971) The Minerals and Gemstones of Nebraska. Educational Circular 2. University of Nebraska - Conservation and Survey Divsion
ⓘ C.H. Davis Quarry	Rocks & Min.: 18:323.
Johnson County ⓘ Tecumseh	[Agate var. Lake Superior Agate] Pabian, Roger K. (1971) The Minerals and Gemstones of Nebraska. Educational Circular 2. University of Nebraska - Conservation and Survey Divsion
Lancaster County ⓘ Agnew	[Agate var. Lake Superior Agate] Pabian, Roger K. (1971) The Minerals and Gemstones of Nebraska. Educational Circular 2. University of Nebraska - Conservation and Survey Divsion
ⓘ Bennet	[Agate var. Lake Superior Agate] Pabian, Roger K. (1971) The Minerals and Gemstones of Nebraska. Educational Circular 2. University of Nebraska - Conservation and Survey Divsion
ⓘ Davey	[Agate var. Lake Superior Agate] Pabian, Roger K. (1971) The Minerals and Gemstones of Nebraska. Educational Circular 2. University of Nebraska - Conservation and Survey Divsion
Nemaha County ⓘ Brock	[Agate var. Lake Superior Agate] Pabian, Roger K. (1971) The Minerals and Gemstones of Nebraska. Educational Circular 2. University of Nebraska - Conservation and Survey Divsion
Otoe County ⓘ Burr	[Agate var. Lake Superior Agate] Pabian, Roger K. (1971) The Minerals and Gemstones of Nebraska. Educational Circular 2. University of Nebraska - Conservation and Survey Divsion
ⓘ Douglas	[Agate var. Lake Superior Agate] Pabian, Roger K. (1971) The Minerals and Gemstones of Nebraska. Educational Circular 2. University of Nebraska - Conservation and Survey Divsion
ⓘ Dunbar	[Chalcedony var. Moss Agate] Pabian, Roger K. (1971) The Minerals and Gemstones of Nebraska. Educational Circular 2. University of Nebraska - Conservation and Survey Divsion
ⓘ Palmyra	[Chalcedony var. Agate] MacFall (1975) Gem Hunter's Guide
ⓘ Syracuse	[Agate var. Lake Superior Agate] Pabian, Roger K. (1971) The Minerals and Gemstones of Nebraska. Educational Circular 2. University of Nebraska - Conservation and Survey Divsion
ⓘ Talmage	[Agate var. Lake Superior Agate] Pabian, Roger K. (1971) The Minerals and Gemstones of Nebraska. Educational Circular 2. University of Nebraska - Conservation and Survey Divsion
Saline County ⓘ Crete	[Agate var. Lake Superior Agate] Pabian, Roger K. (1971) The Minerals and Gemstones of Nebraska. Educational Circular 2. University of Nebraska - Conservation and Survey Divsion
ⓘ Wilber	[Agate var. Lake Superior Agate] Pabian, Roger K. (1971) The Minerals and Gemstones of Nebraska. Educational Circular 2. University of Nebraska - Conservation and Survey Divsion
Saunders County ⓘ Ashland	[Chalcedony var. Agate] MacFall (1975) Gem Hunter's Guide
ⓘ Valparaiso	[Agate var. Lake Superior Agate] Pabian, Roger K. (1971) The Minerals and Gemstones of Nebraska. Educational Circular 2. University of Nebraska - Conservation and Survey Divsion
Seward County ⓘ Pleasant Dale	[Agate var. Lake Superior Agate] Pabian, Roger K. (1971) The Minerals and Gemstones of Nebraska. Educational Circular 2. University of Nebraska - Conservation and Survey Divsion
Wisconsin Ashland County Ashland ⓘ Chequamegon Bay	[Agate var. Lake Superior Agate] Brian Cowger
ⓘ Flambeau River	Mudrey, M. G., Jr. (1979), Geologic summary of the Ashland 2 degree quadrangle:, Wisconsin Geological and Natural History Survey, Open-file Report 79-1, 39 p.
Gogebic Range Mount Whittlesey ⓘ Berkshire Mine (Pioneer Mine; Hoppenyan exploration)	Cordua, William S. (1998) Wisconsin Mineral Locality Index. Rocks & Minerals, 73 (6) 378-399 doi:10.1080/00357529809603078
Barron County ⓘ Blue Hills	Dott, R. J. and I. Dalziel, I., 1972, "Age and Correlation of the Precambrian Baraboo Quartzite of Wisconsin", Journal of Geology, vol. 80, p. 552-568.
Bayfield County Bayfield ⓘ Chequamagon Bay	[Agate var. Lake Superior Agate] Brian Cowger
ⓘ Highway 27 roadcuts	Cordua, William S. (1998) Wisconsin Mineral Locality Index. Rocks & Minerals, 73 (6) 378-399 doi:10.1080/00357529809603078
ⓘ Montrose copper prospects	Cordua, William S. (1998) Wisconsin Mineral Locality Index. Rocks & Minerals, 73 (6) 378-399 doi:10.1080/00357529809603078
Douglas County ⓘ Amicon copper prospect	Dutton, C. E. (1972) Sampling of Copper-bearing Keweenawan Rocks of Northwestern Wisconsin: U.S. Geological Survey Open File Report 9.1267, 13p. Grant, U. S. (1901), Preliminary report on the copper-bearing rocks of Douglas County, Wisconsin, 2nd Ed.: Wisconsin Geological and Natural History Survey Bull. VI Economic Series #3, 83 p.
Amnicon Falls ⓘ Buckley Quarry	Cordua, W.S. (1991) Minerals of the Buckley Quarry, Douglas County, Wisconsin: Mineral News : 7(6): 2-3.
ⓘ Chippewa Mine	Holliday, R. (1955) Investigation of the Chippewa copper-nickel prospect near Rockmont, Douglas County, Wisconsin: U.S. Bureau of Mines Report of Investigations 5114. 11 p.
ⓘ Copper Creek prospects	Dutton, C. E. (1972) Sampling of Copper-bearing Keweenawan Rocks of Northwestern Wisconsin: U.S. Geological Survey Open File Report 9.1267, 13p. Grant, U. S. (1901), Preliminary report on the copper-bearing rocks of Douglas County, Wisconsin, 2nd Ed.: Wisconsin Geological and Natural History Survey Bull. VI Economic Series #3, 83 p.
ⓘ Culligan	Grant, U. S. (1901), Preliminary report on the copper-bearing rocks of Douglas County, Wisconsin, 2nd Ed.: Wisconsin Geological and Natural History Survey Bull. VI Economic Series #3, 83 p.
ⓘ Fond du Lac copper prospect	Dutton, C. E. (1972) Sampling of Copper-bearing Keweenawan Rocks of Northwestern Wisconsin: U.S. Geological Survey Open File Report 9.1267, 13p. Grant, U. S. (1901), Preliminary report on the copper-bearing rocks of Douglas County, Wisconsin, 2nd Ed.: Wisconsin Geological and Natural History Survey Bull. VI Economic Series #3, 83 p.
ⓘ Johnson Materials Co. Quarry	Cordua, William S. (1998) Wisconsin Mineral Locality Index. Rocks & Minerals, 73 (6) 378-399 doi:10.1080/00357529809603078
ⓘ Mabel Nelson Road Quarry	Cordua, William S. (1998) Wisconsin Mineral Locality Index. Rocks & Minerals, 73 (6) 378-399 doi:10.1080/00357529809603078
ⓘ Old Chippewa Mine	Dutton, C. E. (1972) Sampling of Copper-bearing Keweenawan Rocks of Northwestern Wisconsin: U.S. Geological Survey Open File Report 9.1267, 13p. Grant, U. S. (1901), Preliminary report on the copper-bearing rocks of Douglas County, Wisconsin, 2nd Ed.: Wisconsin Geological and Natural History Survey Bull. VI Economic Series #3, 83 p.
ⓘ Solon Springs Quarry	William S. Cordua
South Range ⓘ South Range Quarry	[Chalcedony var. Agate] Cordua, W.S. (1990), Amygdule Minerals of the South Range Quarry, Douglas County, Wisconsin: Rocks and Minerals: 65: 412-415.
ⓘ Weyerhauser Copper Mines (Wascott; County No. 1; County No. 2 or Skrupty; County No. 3)	[Chalcedony] Cordua, William S. (1998) Wisconsin Mineral Locality Index. Rocks & Minerals, 73 (6) 378-399 doi:10.1080/00357529809603078
Iron County Gogebic Range Hurley ⓘ Cary Mine (Superior; Tilden; Nimikon; West Cary; Kakagon; Windsor)	Robinson, G. & G. LaBerge (2013) Minerals of the Lake Superior Iron Ranges: A. E. Seaman Mineral Museum: Michigan Technological University, 52 p.
Montreal ⓘ Montreal Mine (33 Company Mine; Section 33 Mine)	Cordua, William S. (1998) Wisconsin Mineral Locality Index. Rocks & Minerals, 73 (6) 378-399 doi:10.1080/00357529809603078
ⓘ Riverside Road Quarry	Cordua, W. (2011) Geology of new exposures of the 1100 MA (Keweenawan) Kallander Creek Volcanics in Iron County, Wisconsin: Geological Society of America 2011 Annual Meeting Abstracts with Program: p. 93.
Pepin County ⓘ Fayerweather Quarry (Stockholm Quarry; Tiffany Construction Div.; Edward Kraemer and Sons; Inc.)
Pierce County ⓘ Cady Creek quarry	Cordua, William S. (1998) Wisconsin Mineral Locality Index. Rocks & Minerals, 73 (6) 378-399 doi:10.1080/00357529809603078
ⓘ Cave Creek limestone deposit	William S. Cordua collection
ⓘ Don Borst Quarry (Pierce County Highway Department)	William S. Cordua collection
ⓘ Hager City dolomite deposit No. 1	Cordua, William S. (1998) Wisconsin Mineral Locality Index. Rocks & Minerals, 73 (6) 378-399 doi:10.1080/00357529809603078
Maiden Rock ⓘ Maiden Rock Limestone Quarry No. 1	Cordua, W. (1989) Goethite pseudomorphs after marcasite, Maiden Rock, Wisconsin: Rocks and Minerals: 64(2): 124-127.
ⓘ Prescott Quarry	William Cordua
Rock Elm ⓘ Rock Elm impact structure central uplift	French, Bevan, Cordua, W.S. & Plescia, Jeff (2004) The Rock Elm Meteorite Impact Structure, Wisconsin: Geology and Shock Metamorphic Effects in Quartz: Geological Society of America Bulletin, vol. 116(1): 200-218. Cavosie, A.J, Erickson, T.M., & Timms, N.E. (2014) Reidite and shock-twinned zircon in polymict breccia from the Ordovician Rock Elm impact structure, USA: Geological Society of America: Annual Meeting: Abstracts with Programs, vol. 46, no. 6.
Spring Valley ⓘ Crystal Cave	Cunningham, J, , H. Dolliver & W. Cordua (2011) Flaming meteors, dark caves and raging waters: geological curiosities of western Wisconsin: Miller, et. al. ed. Field guides to the geology of the Mid-Continent of North America: Geological Society of America Field Guide 24: 411-424
Polk County Clam Falls Lewis ⓘ 340th Avenue pit	Cordua, William S. (1998) Wisconsin Mineral Locality Index. Rocks & Minerals, 73 (6) 378-399 doi:10.1080/00357529809603078
ⓘ Dresser Trap Rock Quarry (Junction Quarry; Bryan Rock Products Inc.; Dresser)	Cordua, William S. (1998) Wisconsin Mineral Locality Index. Rocks & Minerals, 73 (6) 378-399 doi:10.1080/00357529809603078
St. Croix County ⓘ Burkhardt	[Chalcedony var. Agate] William S. Cordua collection
ⓘ H. & M. Rohl Dolomite Quarry No. 1
Hudson ⓘ Hanley Road road cut	Cordua, William S. (1998) Wisconsin Mineral Locality Index. Rocks & Minerals, 73 (6) 378-399 doi:10.1080/00357529809603078
ⓘ Mimbach Quarry (Mayer Quarry; St. Croix County Highway Department)	Cordua, William S. (1998) Wisconsin Mineral Locality Index. Rocks & Minerals, 73 (6) 378-399 doi:10.1080/00357529809603078
ⓘ St Croix County Highway Department Spooner Quarry	William Cordua
Washburn County ⓘ Mudge prospect	Dutton, C. E. (1972) Sampling of Copper-bearing Keweenawan Rocks of Northwestern Wisconsin: U.S. Geological Survey Open File Report 9.1267, 13p.

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