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Fluorite (CaF2) D01023A.03 |
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| Crystal system | isometric. |
| Habit | massive, granular, botryoidal and sometimes fibrous or columnar; in crystal form as cubes, octahedrons and dodecahedrons. |
| Cleavage | perfect. |
| Fracture | subconchoidal to splintery. |
| Hardness | 4 |
| Specific Gravity | 3.3 |
| Color | extremely variable; it is completely colorless and transparent if pure; it can also be found as yellow, green, blue, pink, purple or black. |
| Luster | transparent to translucent and vitreous. |
| Streak | none. |
| Distinguishing features | when exposed to ultraviolet rays it fluoresces strongly. |
| Uses | used in the making of hydrofluoric acid, which is used in pottery; very clear crystals are used as spectrographic prisms. |
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