2.9" Fluorescent Calcite Crystals - Sept-Îles, Quebec

This is a 2.9" wide calcite crystal cluster, collected near Sept-Îles in Quebec, Canada. The specimen is cleaved along one edge where it was removed from its matrix. Ex-Gordian collection specimen. Under short and longwave ultraviolet light, the calcite exhibits an orange fluorescence.

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.



FOR SALE
$29
DETAILS
SPECIES
Calcite
LOCATION
Near Sept-Îles, Quebec, Canada
SIZE
2.9 x 1.8"
CATEGORY
ITEM
#251239