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California's Rich Pocket Mines

The seven geologic indicators... are important concepts for prospectors to focus on when searching for gold pockets.

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Gold, Quartz & Chalcedony—Part II


The specific gravity of chalcedony is 2.58 to 2.64. This is slightly lower than coarsely crystalline quartz because of slight porosity in chalcedony. Being so light, it will easily wash out of a gold pan.

Reminder: Annual Claim Filings Due


Mining claimants who wish to retain their mining claims on Bureau of Land Management and Forest Service lands through the 2021 assessment year must pay a maintenance fee or file a maintenance fee waiver certificate on or before September 1…

Drywashing for Desert Gold—Part II


…whichever layer I’m getting the best gold, I’ll work that stratum. Some of the best gold in the desert is not always on the bedrock.

Picks & Pans: Confessions of a Professional Nuggetshooter


Howdy, fellow nuggetshooters! My name is Lunk, formerly known as Crummy, a professional nuggetshooter with a few tips for you weekenders who are thinking about going pro.

Prospecting for Silver With a Geiger Counter


Light-colored volcanic tuff or tuffaceous sandstone often contains small amounts of uranium, enough to be detected with a sensitive radiation detector. Sometimes, the mass effect of the radiation is substantial.

Cedar Rim Opal—Discovery of a Giant Opal Field


In 2003, I initiated field reconnaissance of an opal deposit at Cedar Rim in central Wyoming and was amazed at the size of this undocumented deposit located right in the middle of an oil and gas field...

Prospecting With Color


Perhaps no one factor has caused more confusion in the search for ore than the attempt to use color as a guide to prospecting. Yet, there is a reason for every color seen in rocks, so it deserves to be noted.

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The Bawl Mill   • Legislative and Regulatory Update   • Mining Reform and Congress   • Placer Mining in Canada's Yukon Territory   • The Significance of Boulders in Placer Deposits   • Oregon Suction Gold Dredgers Score Big Win   • Michigan Approves Nickel, Copper Mine   • Desert Drywashing   • The History of Gold Mining in Sierra County   • Mining Stock Quotes & Mineral and Metal Prices

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