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Villiaumite (NaF) NS0915D.01 |
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Crystal system |
isometric. |
Habit |
massive or in fragments; in crystal form it is cubic or octahedral. |
Cleavage |
perfect. |
Fracture |
none. |
Hardness |
2-2.5 |
Specific Gravity |
2.8 |
Color |
pale orange to deep red. |
Luster |
varies from vitreous to waxy or frosty. |
Streak |
white. |
Distinguishing features |
displays weak red fluorescence under ultraviolet radiation. |
Uses |
gemstones of up to 12.10 carats have been cut from villiaumite from Mont Saint-Hilaire.
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