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Fluorapatite
Fluorapatite

Enstatite
Enstatite



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Fluorapatite
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Enstatite
Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
3.1-3.25
Uneven
Indistinct
5
Ca 5(PO 4) 3FAnthony et al , Handbook of mineralogy (2001)
 
Brittle
-
-
3.20-3.25
Uneven, Conchoidal
Good/distinct on [210]
5.5
Mg 2Si 2O 6Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references