Mining news, prospecting tips, Colorado geology, and specimen finds from the Rocky Mountain Mining team.
Cripple Creek's gold doesn't look like gold. Locked into telluride minerals like calaverite and sylvanite, it fooled prospectors for years until assayers figured out what they were looking at. Here's the geology and the chemistry behind one of Colorado's strangest ore systems.
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The Crystal Peak district near Lake George has produced some of the world's finest amazonite and smoky quartz specimens for over a century.
Lake George sits at the epicenter of some of the most productive pegmatite mineral collecting in North America.
