3.75" Fluorescent Calcite Crystal Cluster (New Find!) - Potosi Mine

Fluorescent Calcite Crystal Cluster (New Find!) - Potosi Mine #281522

This specimen is part of a new find out of Level 17 of the Potosi Mine in Chihuahua, Mexico. It's a 3.75" wide cluster of yellow-orange calcite crystals with sharp terminations. Each crystal has a darker phantom within. Under shortwave ultraviolet light the crystals exhibit a bright white fluorescence.

Comes with an acrylic display stand.

Calcite, CaCO3, is a carbonate mineral and the most stable polymorph of calcium carbonate. The other polymorphs are the minerals aragonite and vaterite. Calcite crystals are trigonal-rhombohedral, though actual calcite rhombohedra are rare as natural crystals. However, they show a remarkable variety of habits including acute to obtuse rhombohedra, tabular forms, and prisms. Calcite exhibits several twinning types adding to the variety of observed forms. It may occur as fibrous, granular, lamellar, or compact. Cleavage is usually in three directions parallel to the rhombohedron form.

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