3.2" Yellow, Cubic Fluorite Crystal Cluster with Calcite - Spain

This is an alluring, 3.2" wide yellow fluorite crystal cluster that's coated in an aggregation of calcite crystals, collected from the Villabona Mines in Asturias, Spain. The crystals are translucent, fluorescent and display a beautiful deep yellow color. Under both long wave and short wave UV, these fluorite crystals fluoresce a beautiful deep yellow color, while the calcite fluoresces orange-pink. Some fluorite crystals from this locality will display gorgeous fluorescent phantoms within the cubic crystal, dependent on impurities present during formation.

This fluorite cluster comes with an acrylic display stand.

Fluorite is a halide mineral comprised of calcium and fluorine, CaF2. The word fluorite is from the Latin fluo-, which means "to flow". In 1852 fluorite gave its name to the phenomenon known as fluorescence, or the property of fluorite to glow a different color depending upon the bandwidth of the ultraviolet light it is exposed to. Fluorite occurs commonly in cubic, octahedral and dodecahedral crystals in many different colors. These colors range from colorless and completely transparent to yellow, green, blue, purple, pink or black. Purples and greens tend to be the most common colors seen.

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.

Fluorite & Calcite
Villabona Mines, Asturias, Spain
3.2" wide