Vote for your favorite mineral in #MinCup26! - Cuprite vs. Orpiment
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Opal from
Clyde Mine (Lily Mine; Gale Mine; Hoosier; Western Star), Boulder County, Colorado, USA


Locality type:Mine
Classification
Species:Opal
Formula:SiO2 · nH2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Opal data
Locality Data:Click here to view Clyde Mine (Lily Mine; Gale Mine; Hoosier; Western Star), Boulder County, Colorado, USA
Data Identifiers
Mindat Occurrence Record ID:490237
Long-form Identifier:1:3:490237:9
GUID (UUID V4):0
Nearest other occurrences of Opal
4.8km (3.0 miles) ⓘBlack Hawk No. 1 vein, Boulder County Tungsten Mining District, Boulder County, Colorado, USA
27.8km (17.3 miles) ⓘJewelry Shop Mine (West Gold Mine; Sylvanite Mine), Lamartine Mining District, Clear Creek County, Colorado, USA
28.6km (17.8 miles) ⓘColumbia, Lamartine Mining District, Clear Creek County, Colorado, USA
33.3km (20.7 miles) ⓘNorth Table Mountain, Golden, Golden Mining District, Jefferson County, Colorado, USA
36.0km (22.3 miles) ⓘSouth Table Mountain, Golden, Golden Mining District, Jefferson County, Colorado, USA
40.9km (25.4 miles) ⓘGreen Mountain, Golden, Golden Mining District, Jefferson County, Colorado, USA
51.6km (32.0 miles) ⓘHot Sulfur Springs, Grand County, Colorado, USA
57.1km (35.5 miles) ⓘRed Jacket (Star of the West; Star of the West No. 2; Mohawk; Iowa), Montezuma Area, Summit County, Colorado, USA
57.6km (35.8 miles) ⓘSpecimen Mountain, Larimer County, Colorado, USA
86.9km (54.0 miles) ⓘCastle Rock, Castle Rock Area, Douglas County, Colorado, USA
References
Lovering, T.S., Goddard, E.N. (1950) Geology and ore deposits of the Front Range, Colorado. Professional Paper 223. US Geological Survey doi:10.3133/pp223
Eckel, Edwin Butt; Cobban, Robert R.; Mosburg, Shirley K.; Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing.
 
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