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Fluorite is a cubic or dipyramal shaped mineral that comes in blue, purple, yellow, and green. Also called fluorspar, it can be striped or spotted. Its color can be modified by heat or radiation. It derives its name form its ability to emit visible light under the influence of certain rays. It is caused by small metal impurities which can also determine the color of the mineral.
CaF2 - Calcium Fluoride
Class:
Colorless, white, yellow, red, green, blue, purple, brown, black.
Colorless
Vitreous
Transparent to translucent, opaque
3.2
4
Perfect
Conchoidal to splintery
Combinations of cubic crystals, granular, massive
Blue, blue-green, also phosphorescent
Frequency:
Common
Origin:
Rare magmatic, mainly hydrothermal and metastomatic. Associations are very diverse depending on a type of the deposit, in which it occurs.

Occurence:
Nagar, Pakistan; Horni Slakov, Czech Republic; Smith Co. Tennessee, USA; Mont Black massif, France.
Application:
Metallurgy, chemical industry, special optics

 
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