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History & Geology

Critical Metals: Lithium

Prospecting for lithium deposits can take a number of different directions, because this metal can be extracted from a variety of geologically differnet sources.

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Crystallized Gold Mines of California


Gold specimens that include visible crystal formations are among the rarest, most attractive and most valuable forms of gold to be found.

Strategic Metals—Part I


A bill was introduced and passed by the House of Representatives earlier this year that should make the exploration and opening of a mining operation faster and easier.

How To Identify Minerals


There are a number of characteristics that are used when one identifies a mineral. Each characteristic gives an indication as to what the mineral might be, and the combination of them will point to what it is.

The Wisdom of Mark Twain—And Tales of Cheating the Unwary Prospector


I (enjoy) Twain’s description of a gold mine, “A hole in the ground with a liar at the top.” Some humor here? You bet, but I’m sure he meant it to be a real eye opener as well.

Placer Gold Deposits in the Western States


…to see the huge differences between the gold production amounts of the Western States, let’s look at the gold production—both hard rock and placer—of these 13 states up to the present.

Gold Refining In The Ancient World


One thing that stood out for me is that Agricola was very specific about the type of metal or wood in the implements and vessels that were to be used.

Residual Placers: An Often Overlooked Gold Source


Because the forces of erosion and gravity tend to carry lighter materials like quartz away more easily, the heavy minerals like gold or silver will tend to be concentrated in the general area around the vein outcrop. These concentrations are what make residual placers so attractive.

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