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This Specimen has been sold.
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2.5" Dogtooth Calcite Crystal Cluster (New Find) - China
This is an intriguing, 2.5" wide, calcite crystal cluster that is part of a new find in Qinglong, China. The scalenohedral calcite crystals are encrusted in red micro-crystals that may be fluorite. It is claimed that this fluorite is Yttrofluorite (fluorite containing an appreciable amount of the rare earth element yttrium), but we have not been able to independently verify this.
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.
SPECIES
Calcite
LOCATION
Dachang, Qinglong, Guizhou, China
SIZE
2.5 x 1.6"
CATEGORY
ITEM
#177578
