Tenacity
Brittle
Brittle
Solubility
slightly water soluble and in hot hydrochloric acid
-
Durability
-
-
Specific Gravity
3.00-3.255.50-5.90
1
7.18
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Fracture
Subconchoidal, Uneven, ConchoidalWalter Schumann
Conchoidal
Cleavage
Octahedral, perfect on {111}, parting on {011}
On {10 1 0}, perfect; parting on {000 1 }
Mohs Hardness
44
2
10
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Chemical Composition
CaF2
(Zn,Mn2+ )OMichael OâDonoghue , Gems, Sixth Edition (2006)