Fluorite
III - Halogenides |
Name | Fluorite
(Fluor Spar) |
|
Chemistry | CaF2 | |
Hardness | 4 | |
Lustre | vitreous | |
Colour | white, yellow, green, red, blue | |
Streak | white | |
Density [g/cm3] | 5.4 - 5.9 | |
Crystal habit | isometric, crystals [100], [111], [110], [210], twins [111] | |
Cleavage, Fracture | [111] perfect | |
other characteristics and occurrences | granular, coarse crystalline, often colours arranged in zone, common in hydrothermal veins (low temperature) with sulfides, sulfates and quartz (SiO2) | |