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History & Geology

The Amazing Mineral Tourmaline

It is a gemstone, and yet it is also closely associated with many types of metal ores. It's valuable itself but often points toward other valuable minerals—that is certainly something prospectors want to know more about!

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Additional articles that might interest you...

The Giant King Mine


Most gold-bearing veins in this region are controlled by fractures associated with the Melones Fault, a late Cretaceous structure that is 108 to 127 million years old.

Undiscovered Placer Deposits in Alaska


These conditions don’t just apply to Alaska and the Yukon; they apply to western Canada and even to the mountainous western United States.

The Golden Days of Julian, California


Some scattered reports say that gold may have been washed from streams here as early as the 1840s, but the undisputed major discovery came in 1870.

Indicator Minerals for Gold & Silver


In this article, we’re going to take a look at the minerals that contain gold and silver, and how you as a prospector can identify them in the field.

What Are Those Rocks In My Pan?


The placer mineral identification key is designed to answer this question. It attempts to recognize all the minerals in your gold pan concentrates.

Mineral Deposit Trends: Real and Imaginary


One of the most important things prospectors do is work to figure out where to go prospecting. Along with understanding the basic geology and putting yourself in a favorable area, one of the things a prospector might consider in finding a location to search is the existence of mining belts also known as mineral deposit trends.

Eolian Placer Gold


I would first like to mention that I am not a geologist. I have, however, spent the last 8 years intently searching for gold nuggets with a metal detector. I have found gold in numerous locations, and in several different types of gold deposits.

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