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History & Geology

Copper Deposits of Alaska

Only the famous Kennecott copper mine was able to continue operating through the Depression owing to the exceptional richness of its ore.

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$50 Million in Gold From 1857 Shipwreck Approved for Sale


The gold is all for sale. Just one tiny coin alone could go for $1 million because of its combination of rarity and the history behind it...

Simple Rules of Gold Geology: Comparing Epithermal and Mesothermal Deposits


Geology is a science of general tendencies with frequent exceptions, not one of hard and fast rules that are always true and never vary. For almost every well-accepted rule of gold deposits, I can point you to a number of important exceptions.

The Tombstone Silver-Lead District, Arizona


In 1877, a prospector named Ed Schieffelin discovered silver in “the middle of nowhere” and staked two claims: “Tumbstone” and “Graveyard.” Soon a town and mining district were organized and acquired the name “Tombstone” after making a spelling correction.

All About Quartz—Part II


In our May 2013 issue, we took a look at the mineral quartz, a mineral very commonly associated with gold. However, gold is not the only reason prospectors are interested in quartz. Quartz can also be very valuable as a gemstone

Round Mountain, Nevada


There are a number of veins in the disseminated mineralization, but the principle ones on Round Mountain are known as the Los Gazabo and the Keane.

Natural Gold Alloys


Natural gold is never 100% pure; all natural nuggets contain at least some impurities. We're going to take a look at just what some of those impurities might be.

Perception of Mining vs. Reality


Many modern mining companies have taken to making a special effort to ensure the goods and services they need are supplied as much as possible out of the local economy.

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