Tenacity
Brittle
-
Solubility
slightly water soluble and in hot hydrochloric acid
-
Durability
-
-
Specific Gravity
3.00-3.253.05-3.08
1
7.18
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Fracture
Subconchoidal, Uneven, ConchoidalWalter Schumann
Subconchoidal, Uneven, Conchoidal
Cleavage
Octahedral, perfect on {111}, parting on {011}
Poor on {100}
Mohs Hardness
45
2
10
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Chemical Composition
CaF2
Mn2+ Al(PO 4)(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)