	*Beste, Bob (2005) Location Guide for Rockhounds in the United States* (3rd ed.) Vol. 3 - Part III - Ohio through Wyoming.**	Book (volume)
	concerned, Ohio is unique in but a single gemstone, an exceptionally high quality, colorful flint that is...chert, translucent chalcedony, jasp-agate and common opal, rivaling in beauty the Arizona agatized wood. This...ASHTABULA COUNTY CONNEAUT, area pits, quarries, rd. cuts, etc.⎯cone-in-cone Calcite. CLERMONT COUNTY MILFORD...CLINTON COUNTY WILMINGTON, area of Todd’s Ford, a mineral deposit⎯Hematite. COSHOCTON COUNTY AREA, townships...townships of Washington, Virginia, Bedford, Jackson, Jefferson, Bethlehem, Monroe and Clark; on regional
	*Beste, Bob (1996) Location Guide for Rockhounds in the United States* (2nd ed.) Vol. 3 - Part III - Ohio to Wyoming.**	Book (volume)
	concerned, Ohio is unique in but a single gemstone, an exceptionally high quality, colorful flint that is...chert, translucent chalcedony, jasp-agate and common opal, rivaling in beauty the Arizona agatized wood. This...ASHTABULA COUNTY CONNEAUT, area pits, quarries, rd. cuts, etc.⎯cone-in-cone Calcite. CLERMONT COUNTY MILFORD...CLINTON COUNTY WILMINGTON, area of Todd’s Ford, a mineral deposit⎯Hematite. COSHOCTON COUNTY AREA, townships...townships of Washington, Virginia, Bedford, Jackson, Jefferson, Bethlehem, Monroe and Clark; on regional
	*Beste, Bob (2014) Location Guide for Rockhounds in the United States* (4th ed.) Vol. 4 - Part IV - South Dakota through Wyoming.**	Book (volume)
	Plains, wells drilled deep into this unit provide an inexhaustible supply of cold artesian, Rocky Mountain...beds, excavations, etc.Selenite roses. BRULE COUNTY AREA: in the Oacoma zone of the Pierre Fm. On Elm...gray Barite rosette up to 5 or 6 inches. CAMPBELL COUNTY MOUND CITY, W to the Missouri R., regional hillsides...tributary gravels, etc.petrified wood, wood opal. CORSON COUNTY LITTLE EAGLE:  area ridges, slopes, stream...stream beds, etc. petrified wood, wood opal;  along the Grand R. though entire Co., regional banks, breaks
	*Ransom, Jay Ellis (1974) Gems and Minerals of America* - A Guide to Rock Collecting. Harper & Row.**	Book
	• • • • ': . ·• Ranson1 , Jay E . Gems an d minerals of Arnerica 549 . 075 RAiJSO rti SAUSALITO...Gemstones and Minerals; Volcanic Flows; Values in an Outcrop 4. Preparation for Field Collecting 52...Petrified Wood 131 Characteristics of Agates; Opal, Queen of the Gems; Petrified Wood; Commonly Occurring...Dakota Tennessee Texas Utah Vermont Virginia Washington West Virginia Wisconsin Wyoming Appendixes 615...Family Gemstones The Various Names and Forms of Agate Opal and Its Varieties Recommendations for Use of Polishing

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Opal-AN from Mondovi, Lincoln County, Washington, USA

Opal-AN from
Mondovi, Lincoln County, Washington, USA