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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...

Gangue Minerals - What Do They Tell Us?


There are a large number of different kinds of gangue minerals, and each of them has its own tale to contribute to the story of the chemistry and geology of a deposit.

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Yesterday's Gold—Today's Mine


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Nevada's Silver City Gold District -- Part II


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