3.1" Calcite Crystal Cluster with Pyrite Inclusions - Spain

This is a beautiful, 3.1" wide cluster of lustrous calcite crystals with pyrite inclusions, collected from the Moscona Mine in Asturias, Spain. The calcite formed in association with dolomite.

It 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.

Calcite, Dolomite & Pyrite
Moscona Mine, Solís, Corvera de Asturias, Asturias, Spain
3.1 x 2.8"