Colorado · Boulder County
Past Producer
Silent Friend
Boulder County, Colorado, United States
Tungsten
Gold
Silver
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USGS source ↗
Commodities
Primary
Tungsten
Tertiary
Gold, Silver
Commodity type
M
Materials
Ore minerals
Pyrite, Gold, Chalcopyrite, Galena, Sphalerite, Tennantite
Geology
Host rock
Schist
Economic & production
Development status
Past Producer
Identification
Deposit ID
10166210
Region
NA
Data score
D
Coordinates
39.99799, -105.36179
References
REF. USGS PROF PAPER # 223 PLATE 22