An underground copper mine located just south of Laurium. The prospect was discovered in 1904 by diamond drilling exploration, and a shaft was sunk in 1907. In 1909, the Calumet and Hecla Consolidated Copper Company took over operations and continued mining until 1920 when the mine closed because of water problems. The shaft reached the 12th level (approximately 1,660 feet deep) and some exploratory drifting was done. For variety of minerals, Laurium provides perhaps the best collecting in the Keweenaw, especially for the micro-mineral collector.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.

ⓘ Copper

Mineral List

19 valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

ⓘ 'Amygdaloidal basalt'

ⓘ Scoria

Detailed Mineral List:

ⓘ Analcime

Formula: Na(AlSi₂O₆) · H₂O

References:

Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.

ⓘ Atacamite

Formula: Cu₂(OH)₃Cl

References:

Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.

ⓘ Baryte

Formula: BaSO₄

References:

Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.

ⓘ Calcite

Formula: CaCO₃

References:

Morris Jr., T. (1983) Michigan Mineralogy: A Locality Index. Rocks & Minerals: 58(3): 109.

ⓘ Chalcocite

Formula: Cu₂S

References:

Morris Jr., T. (1983) Michigan Mineralogy: A Locality Index. Rocks & Minerals: 58(3): 109.

ⓘ 'Chlorite Group'

References:

Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.

ⓘ Copper

Formula: Cu

References:

Morris Jr., T. (1983) Michigan Mineralogy: A Locality Index. Rocks & Minerals: 58(3): 109.

ⓘ Cuprite

Formula: Cu₂O

References:

Morris Jr., T. (1983) Michigan Mineralogy: A Locality Index. Rocks & Minerals: 58(3): 109.

ⓘ Datolite

Formula: CaB(SiO₄)(OH)

Habit: Crystals and nodules

References:

Morris Jr., T. (1983) Michigan Mineralogy: A Locality Index. Rocks & Minerals: 58(3): 109.

ⓘ Epidote

Formula: (CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)

References:

Morris Jr., T. (1983) Michigan Mineralogy: A Locality Index. Rocks & Minerals: 58(3): 109.

ⓘ Hematite

Formula: Fe₂O₃

References:

Morris Jr., T. (1983) Michigan Mineralogy: A Locality Index. Rocks & Minerals: 58(3): 109.

ⓘ 'K Feldspar'

References:

Travis Olds collection

ⓘ 'K Feldspar var. Adularia'

Formula: KAlSi₃O₈

References:

Travis Olds collection

ⓘ Kinoite

Formula: Ca₂Cu₂(H₂O)₂[Si₃O₁₀]

References:

Morris Jr., T. (1983) Michigan Mineralogy: A Locality Index. Rocks & Minerals: 58(3): 109.

ⓘ Laumontite

Formula: CaAl₂Si₄O₁₂ · 4H₂O

References:

Morris Jr., T. (1983) Michigan Mineralogy: A Locality Index. Rocks & Minerals: 58(3): 109.

ⓘ Malachite

Formula: Cu₂(CO₃)(OH)₂

References:

Morris Jr., T. (1983) Michigan Mineralogy: A Locality Index. Rocks & Minerals: 58(3): 109.

ⓘ Microcline

Formula: K(AlSi₃O₈)

References:

Morris Jr., T. (1983) Michigan Mineralogy: A Locality Index. Rocks & Minerals: 58(3): 109.

ⓘ Pumpellyite-(Fe2+)

Formula: Ca₂Fe²⁺Al₂(Si₂O₇)(SiO₄)(OH,O)₂ · H₂O

References:

Travis Olds collectionIdentification: Visual Identification

ⓘ Pumpellyite-(Mg)

Formula: Ca₂MgAl₂(Si₂O₇)(SiO₄)(OH)₂ · H₂O

References:

www.sauktown sales.com

ⓘ 'Pumpellyite Subgroup'

Formula: Ca₂XAl₂[Si₂O₆(OH)][SiO₄](OH)₂A

References:

Morris Jr., T. (1983) Michigan Mineralogy: A Locality Index. Rocks & Minerals: 58(3): 109.

ⓘ Quartz

Formula: SiO₂

References:

Morris Jr., T. (1983) Michigan Mineralogy: A Locality Index. Rocks & Minerals: 58(3): 109.

✪ Saponite

Formula: Ca_0.25(Mg,Fe)₃((Si,Al)₄O₁₀)(OH)₂ · nH₂O

Habit: Radial sprays of white acicular crystals to 1 mm!

Colour: White, sometimes has light red or green coloring.

Description: Any crystals of smectite are astonishing. This locality and several nearby produce the world's best saponite crystals.

References:

Collection Elmar Lackner

Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.

ⓘ Silver

Formula: Ag

References:

Morris Jr., T. (1983) Michigan Mineralogy: A Locality Index. Rocks & Minerals: 58(3): 109.

Gallery:

Cu₂Sⓘ Chalcocite

Cuⓘ Copper

(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)ⓘ Epidote

Ca₂Cu₂(H₂O)₂[Si₃O₁₀]ⓘ Kinoite

Cu₂(CO₃)(OH)₂ⓘ Malachite

Ca₂MgAl₂(Si₂O₇)(SiO₄)(OH)₂ · H₂Oⓘ Pumpellyite-(Mg)

Ca₂XAl₂[Si₂O₆(OH)][SiO₄](OH)₂Aⓘ 'Pumpellyite Subgroup'

SiO₂ⓘ Quartz

Ca_0.25(Mg,Fe)₃((Si,Al)₄O₁₀)(OH)₂ · nH₂Oⓘ Saponite

Agⓘ Silver

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘ	Copper	1.AA.05	Cu
ⓘ	Silver	1.AA.05	Ag
Group 2 - Sulphides and Sulfosalts
ⓘ	Chalcocite	2.BA.05	Cu₂S
Group 3 - Halides
ⓘ	Atacamite	3.DA.10a	Cu₂(OH)₃Cl
Group 4 - Oxides and Hydroxides
ⓘ	Cuprite	4.AA.10	Cu₂O
ⓘ	Hematite	4.CB.05	Fe₂O₃
ⓘ	Quartz	4.DA.05	SiO₂
Group 5 - Nitrates and Carbonates
ⓘ	Calcite	5.AB.05	CaCO₃
ⓘ	Malachite	5.BA.10	Cu₂(CO₃)(OH)₂
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘ	Baryte	7.AD.35	BaSO₄
Group 9 - Silicates
ⓘ	Datolite	9.AJ.20	CaB(SiO₄)(OH)
ⓘ	Epidote	9.BG.05a	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
ⓘ	Pumpellyite-(Fe2+)	9.BG.20	Ca₂Fe²⁺Al₂(Si₂O₇)(SiO₄)(OH,O)₂ · H₂O
ⓘ	Pumpellyite-(Mg)	9.BG.20	Ca₂MgAl₂(Si₂O₇)(SiO₄)(OH)₂ · H₂O
ⓘ	Kinoite	9.BH.10	Ca₂Cu₂(H₂O)₂[Si₃O₁₀]
ⓘ	Saponite	9.EC.45	Ca_0.25(Mg,Fe)₃((Si,Al)₄O₁₀)(OH)₂ · nH₂O
ⓘ	Microcline	9.FA.30	K(AlSi₃O₈)
ⓘ	Analcime	9.GB.05	Na(AlSi₂O₆) · H₂O
ⓘ	Laumontite	9.GB.10	CaAl₂Si₄O₁₂ · 4H₂O
Unclassified
ⓘ	'K Feldspar var. Adularia'	-	KAlSi₃O₈
ⓘ	'Pumpellyite Subgroup'	-	Ca₂XAl₂[Si₂O₆(OH)][SiO₄](OH)₂A
ⓘ	'Chlorite Group'	-
ⓘ	'K Feldspar'	-

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Analcime	Na(AlSi₂O₆) · H₂O
H	ⓘ Atacamite	Cu₂(OH)₃Cl
H	ⓘ Datolite	CaB(SiO₄)(OH)
H	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
H	ⓘ Kinoite	Ca₂Cu₂(H₂O)₂[Si₃O₁₀]
H	ⓘ Laumontite	CaAl₂Si₄O₁₂ · 4H₂O
H	ⓘ Malachite	Cu₂(CO₃)(OH)₂
H	ⓘ Pumpellyite Subgroup	Ca₂XAl₂[Si₂O₆(OH)][SiO₄](OH)₂A
H	ⓘ Pumpellyite-(Fe2+)	Ca₂Fe²⁺Al₂(Si₂O₇)(SiO₄)(OH,O)₂ · H₂O
H	ⓘ Pumpellyite-(Mg)	Ca₂MgAl₂(Si₂O₇)(SiO₄)(OH)₂ · H₂O
H	ⓘ Saponite	Ca_0.25(Mg,Fe)₃((Si,Al)₄O₁₀)(OH)₂ · nH₂O
B	Boron
B	ⓘ Datolite	CaB(SiO₄)(OH)
C	Carbon
C	ⓘ Calcite	CaCO₃
C	ⓘ Malachite	Cu₂(CO₃)(OH)₂
O	Oxygen
O	ⓘ K Feldspar var. Adularia	KAlSi₃O₈
O	ⓘ Analcime	Na(AlSi₂O₆) · H₂O
O	ⓘ Atacamite	Cu₂(OH)₃Cl
O	ⓘ Baryte	BaSO₄
O	ⓘ Calcite	CaCO₃
O	ⓘ Cuprite	Cu₂O
O	ⓘ Datolite	CaB(SiO₄)(OH)
O	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
O	ⓘ Hematite	Fe₂O₃
O	ⓘ Kinoite	Ca₂Cu₂(H₂O)₂[Si₃O₁₀]
O	ⓘ Laumontite	CaAl₂Si₄O₁₂ · 4H₂O
O	ⓘ Malachite	Cu₂(CO₃)(OH)₂
O	ⓘ Microcline	K(AlSi₃O₈)
O	ⓘ Pumpellyite Subgroup	Ca₂XAl₂[Si₂O₆(OH)][SiO₄](OH)₂A
O	ⓘ Pumpellyite-(Fe2+)	Ca₂Fe²⁺Al₂(Si₂O₇)(SiO₄)(OH,O)₂ · H₂O
O	ⓘ Pumpellyite-(Mg)	Ca₂MgAl₂(Si₂O₇)(SiO₄)(OH)₂ · H₂O
O	ⓘ Quartz	SiO₂
O	ⓘ Saponite	Ca_0.25(Mg,Fe)₃((Si,Al)₄O₁₀)(OH)₂ · nH₂O
Na	Sodium
Na	ⓘ Analcime	Na(AlSi₂O₆) · H₂O
Mg	Magnesium
Mg	ⓘ Pumpellyite-(Mg)	Ca₂MgAl₂(Si₂O₇)(SiO₄)(OH)₂ · H₂O
Mg	ⓘ Saponite	Ca_0.25(Mg,Fe)₃((Si,Al)₄O₁₀)(OH)₂ · nH₂O
Al	Aluminium
Al	ⓘ K Feldspar var. Adularia	KAlSi₃O₈
Al	ⓘ Analcime	Na(AlSi₂O₆) · H₂O
Al	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
Al	ⓘ Laumontite	CaAl₂Si₄O₁₂ · 4H₂O
Al	ⓘ Microcline	K(AlSi₃O₈)
Al	ⓘ Pumpellyite Subgroup	Ca₂XAl₂[Si₂O₆(OH)][SiO₄](OH)₂A
Al	ⓘ Pumpellyite-(Fe2+)	Ca₂Fe²⁺Al₂(Si₂O₇)(SiO₄)(OH,O)₂ · H₂O
Al	ⓘ Pumpellyite-(Mg)	Ca₂MgAl₂(Si₂O₇)(SiO₄)(OH)₂ · H₂O
Al	ⓘ Saponite	Ca_0.25(Mg,Fe)₃((Si,Al)₄O₁₀)(OH)₂ · nH₂O
Si	Silicon
Si	ⓘ K Feldspar var. Adularia	KAlSi₃O₈
Si	ⓘ Analcime	Na(AlSi₂O₆) · H₂O
Si	ⓘ Datolite	CaB(SiO₄)(OH)
Si	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
Si	ⓘ Kinoite	Ca₂Cu₂(H₂O)₂[Si₃O₁₀]
Si	ⓘ Laumontite	CaAl₂Si₄O₁₂ · 4H₂O
Si	ⓘ Microcline	K(AlSi₃O₈)
Si	ⓘ Pumpellyite Subgroup	Ca₂XAl₂[Si₂O₆(OH)][SiO₄](OH)₂A
Si	ⓘ Pumpellyite-(Fe2+)	Ca₂Fe²⁺Al₂(Si₂O₇)(SiO₄)(OH,O)₂ · H₂O
Si	ⓘ Pumpellyite-(Mg)	Ca₂MgAl₂(Si₂O₇)(SiO₄)(OH)₂ · H₂O
Si	ⓘ Quartz	SiO₂
Si	ⓘ Saponite	Ca_0.25(Mg,Fe)₃((Si,Al)₄O₁₀)(OH)₂ · nH₂O
S	Sulfur
S	ⓘ Baryte	BaSO₄
S	ⓘ Chalcocite	Cu₂S
Cl	Chlorine
Cl	ⓘ Atacamite	Cu₂(OH)₃Cl
K	Potassium
K	ⓘ K Feldspar var. Adularia	KAlSi₃O₈
K	ⓘ Microcline	K(AlSi₃O₈)
Ca	Calcium
Ca	ⓘ Calcite	CaCO₃
Ca	ⓘ Datolite	CaB(SiO₄)(OH)
Ca	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
Ca	ⓘ Kinoite	Ca₂Cu₂(H₂O)₂[Si₃O₁₀]
Ca	ⓘ Laumontite	CaAl₂Si₄O₁₂ · 4H₂O
Ca	ⓘ Pumpellyite Subgroup	Ca₂XAl₂[Si₂O₆(OH)][SiO₄](OH)₂A
Ca	ⓘ Pumpellyite-(Fe2+)	Ca₂Fe²⁺Al₂(Si₂O₇)(SiO₄)(OH,O)₂ · H₂O
Ca	ⓘ Pumpellyite-(Mg)	Ca₂MgAl₂(Si₂O₇)(SiO₄)(OH)₂ · H₂O
Ca	ⓘ Saponite	Ca_0.25(Mg,Fe)₃((Si,Al)₄O₁₀)(OH)₂ · nH₂O
Fe	Iron
Fe	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
Fe	ⓘ Hematite	Fe₂O₃
Fe	ⓘ Pumpellyite-(Fe2+)	Ca₂Fe²⁺Al₂(Si₂O₇)(SiO₄)(OH,O)₂ · H₂O
Fe	ⓘ Saponite	Ca_0.25(Mg,Fe)₃((Si,Al)₄O₁₀)(OH)₂ · nH₂O
Cu	Copper
Cu	ⓘ Atacamite	Cu₂(OH)₃Cl
Cu	ⓘ Chalcocite	Cu₂S
Cu	ⓘ Cuprite	Cu₂O
Cu	ⓘ Copper	Cu
Cu	ⓘ Kinoite	Ca₂Cu₂(H₂O)₂[Si₃O₁₀]
Cu	ⓘ Malachite	Cu₂(CO₃)(OH)₂
Ag	Silver
Ag	ⓘ Silver	Ag
Ba	Barium
Ba	ⓘ Baryte	BaSO₄

Other Regions, Features and Areas containing this locality

North America PlateTectonic Plate

Mid-continent DomainDomain

USA

Michigan
- Keweenaw PeninsulaPeninsula
Midcontinent RiftGeologic Province

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Cornwall, H.R., Wright, J.C. (1956) Geologic Map of the Laurium Quadrangle, Michigan. United States Geological Survey Map MF-47, scale 1:24,000.

Morris Jr., T. (1983) Michigan Mineralogy: A Locality Index. Rocks & Minerals: 58(3): 109.

The Copper Country Rock & Mineral Club (2001) Red Gold and Tarnished Silver, 2nd edition. Self-Published. 44 pages.

Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.

Kaminski-Hamka, T. (2011) Copper Mines of Houghton County, Michigan. Copperlady Press. 120 pages.

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Laurium Mine, Osceola Township, Houghton County, Michigan, USAiRegional Level TypesLaurium MineMine Osceola TownshipTownship Houghton CountyCounty MichiganState USACountry function showexplain() { $("#locexplain").toggle(); if (typeof movemap === "function") movemap(); }

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Detailed Mineral List:

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List of minerals arranged by Strunz 10th Edition classification

List of minerals for each chemical element

Other Regions, Features and Areas containing this locality

References

Laurium Mine, Osceola Township, Houghton County, Michigan, USA i
Regional Level Types
Laurium Mine Mine
Osceola Township Township
Houghton County County
Michigan State
USA Country