20801 - Top Beautiful Huge 5.41 Inch Calcite Crystals from South Morocco - New Location

Huge and sharp crystals of calcite from a new location unpublished in the mountains of the Erich region, Morocco.

Calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (CaCO3). The Mohs scale of mineral hardness, based on scratch hardness comparison, defines value 3 as "calcite".

Other polymorphs of calcium carbonate are the minerals aragonite and vaterite. Aragonite will change to calcite over timescales of days or less at temperatures exceeding 300 °C and vaterite is even less stable.