7.4" Purple Edge Fluorite Crystal Cluster - Qinglong Mine, China

This is a 7.4" wide cluster of purple-edge, cubic fluorite crystals that formed in association with bladed barite, collected from the Qinglong Mine in the Guizhou Province of China. Under shortwave UV, the fluorite crystals fluoresce a faint purple color.

One edge of this specimen has been cut flat for presentation purposes, however it is accompanied by an acrylic display stand to assist with presentation.

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, and colorless, pink, and black are the rarest.

Fluorite, Quartz & Barite
Qinglong Mine, Dachang Sb ore field, Qinglong County, Qianxinan, Guizhou, China
7.4 x 4"