10.7" Polished Blue Calcite Bowl - Madagascar

This is a beautiful, polished blue calcite bowl from Madagascar. It has been polished to a glossy finish to highlight the attractive blue color of the mineral.

This blue calcite was mined from the Norcross-Madagascar blue calcite fields. This type of calcite likely occurred as a massive conglomerate, formed from mineral rich water solidifying following accumulation as flowstone and/or through precipitative processes.

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. Its fracture is conchoidal, but difficult to obtain.
FOR SALE
$495
DETAILS
SPECIES
Calcite
LOCATION
Madagascar
SIZE
10.7 x 9.1 x 4"
CATEGORY
SUB CATEGORY
ITEM
#209967