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Fluorite
| Chemical Formula | CaF2 |
| Mohs Hardness | 4 |
| Specific gravity | 3.2 |
| Description |
Fluorite is the mineral form of calcium fluoride and belongs to the halide minerals. Fluorite is a colorful mineral, both in visible and ultraviolet light. Fluorite is named after the phenomenon of fluorescence. Fluorescence involves the elevation of electron energy levels by quanta of ultraviolet light, followed by the progressive falling back of the electrons into their previous energy state, releasing quanta of visible light in the process. In fluorite, the visible light emitted is most commonly blue, but red, purple, yellow, green and white also occur. The fluorescence of fluorite may be due to mineral impurities, such as yttrium and ytterbium, or organic matter, such as volatilehydrocarbons in the crystal lattice. |
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