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6 Intriguing and Eye-Catching Specimens

Editor's Note: This is the latest installment of the Common Ground blog.  By Antoinette Rahn It's been a few years (Ok, it’s been decades) since I...
Arsenopyrite specimen Panasquiera

Arsenic Family Minerals Part I: Liroconite, Clinoclase, Olivenite and Chalcophyllite

Story by Bob Jones Arsenic is a lethal poison, but nature uses it to create some very beautiful minerals. We are all familiar with the...
Zinc mine products shine in ultraviolet

Rainbow Rocks: Collectability of Fluorescent Minerals

By Bob Jones I first became interested in fluorescent minerals in the 1930s, when the property of fluorescence was considered more of a novelty than...

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