History & Geology
The Downieville Gold District
January 2011 by Chris Ralph

All About Quartz—Part I
One of the first minerals most prospectors learn to recognize is quartz, because, in the right circumstances, it can be an excellent indicator mineral for prospectors. Quartz is common, easy to identify, and is often associated with gold and other valuable metal deposits.
All About Chalcopyrite

Exploration Rush at Tonopah, Nevada
A few months later, a young, greenhorn lawyer agreed to pay to have it assayed, and the quartz turned out to be rich in both gold and silver.
Picks & Pans: Gold Recovery in Placer Mining Operations

The Pedro Gold Dredge

Why Haven't They Mined This Claim?

Prospecting for Copper Ores—Part II
Copper is a critically important metal that we need to run our modern electronic society, and the long term outlook for this metal is for a steady increase in price.
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