4.4" Scalenohedral Calcite Crystal Cluster - Cocineras Mine, Mexico

This is a cluster of lustrous, scalenohedral calcite crystals that was collected from the Cocineras Mine in Chihuahua, Mexico. The calcite formed from a bed of colorless fluorite crystals which can be seen by viewing what could be considered the underside of the specimen.

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 & Fluorite
Cocineras Mine, Santa Eulalia Distract, Chihuahua, Mexico
4.4 x 3.1"