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Prospecting & Detecting

This is Why You Check Your Tailings

The nugget was cast aside with larger rocks during the screening process, but it was found later by an employee...

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The Idaho Gamble Part 2


The Essentials of Dry Washing


Most dry washers have a feed rate adjustment. It needs to be set so that the material flows evenly over the riffles and does not bury them.

ICMJ Visits Downieville, California


The Smell of Gold—Part I


Some claim they can smell gold. This may be, but when I take a whiff of gold, I smell dirt, rotten eggs, garlic or just nothing: my nose is everything but sensitive.

Good Assays and Bad


The high prices for gold and silver are exciting and certainly have revolutionized the prospecting and mining scene. New interest in gold and silver mining is springing up from every corner, from individual prospectors armed with gold pans to exploration and mining companies working to set up multimillion dollar commercial operations producing hundreds of thousands of ounces per year. The idea of getting riches from rocks is one that motivates a lot of folks all over the globe. It’s an exciting time, but this excitement brings out another side...

Practical Advice for Milling Hard Rock Ores


The problem is that extracting gold from hard rock is often a lot more difficult than processing placer gravels. Still, there is some very high-grade ore out there in many old mining areas.

'Outer Space' Diamond Headed for Auction


Black diamonds, also known as carbonado, are extremely rare, and are found naturally only in Brazil and Central Africa. The cosmic origin theory is based on their carbon isotopes and high hydrogen content.

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