Tenacity
Brittle
Sectile
Solubility
slightly water soluble and in hot hydrochloric acid
-
Durability
-
-
Specific Gravity
3.00-3.252.39
1
7.18
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Fracture
Subconchoidal, Uneven, ConchoidalWalter Schumann
Irregular
Cleavage
Octahedral, perfect on {111}, parting on {011}
Perfect on {0001}
Mohs Hardness
42.5
2
10
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Chemical Composition
CaF2
Mg(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)