ALFRED PASIEKA / SCIENCE PHOTO LIBRARY ALFRED PASIEKA / SCIENCE PHOTO LIBRARY
Fluorite in dolomite. Crystals of mauve fluorite, naturally occurring calcium fluoride (Ca.F2) in dolomite. In the presence of impurities, in this case zinc, fluorite can be a variety of colours such as the mauve seen here. Fluorite usually occurs as cubic octahedral crystals. It is found in North America, Russia, Europe and China. Dolomite, a common mineral, is naturally occurring calcium magnesium carbonate (Ca.Mg(CO3)2).
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