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(c) Mineral Picture courtesy of www.yuprocks.com
Mineral Picture courtesy of www.yuprocks.com

FluoriteCaF2

Class: Halide
Hardness: 4
Density: 3.1 - 3.3
Streak: White
Lustre: Vitreous
Habit: Crystals, usually cubic
Colours: Commonly colourless, blue, purple or green, but any is possible.

  Crystal System: Isometric
Cleavage: Perfect octahedral
Fracture: Conchoidal
Magnetism: None
Reaction with HCl: Unknown

Identification in hand sample:
Cubic crystals, hardness and colour indicative.

Associations:
Common in hydrothermal mineral deposits associated with sulfides, carbonates and barite.

Industrial / ecomonic uses:
Main source of fluorine (which is added to drinking water, toothpaste, used as a flux in industrial uses and as part of CFCs)

  

Inaccurate data? Better photos? .