Gray Calcite Crystals

Calcium Carbonate, CaCO3

Calcite is a very broadly distributed mineral formed under a wide range of conditions. It is found as sedimentary limestone and chalk, as metamorphic marble derived from limestone and dolomite, and as travertine precipitated from thermal springs and other surface waters. Calcite is often spectacular in its occurrence as stalactites and stalagmites.

Rocks from Bob's Collection

Index of Specimen Images

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