Density: 3.1 - 3.3
Habit: Crystals, usually cubic
Colours: Commonly colourless, blue, purple or green, but any is possible.
| ||Crystal System: Isometric|
Cleavage: Perfect octahedral
Reaction with HCl: Unknown
Identification in hand sample:
Cubic crystals, hardness and colour indicative.
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)