Tenacity
Brittle
Brittle
Solubility
slightly water soluble and in hot hydrochloric acid
-
Durability
-
-
Specific Gravity
3.00-3.255.85-6.15
1
7.18
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Fracture
Subconchoidal, Uneven, ConchoidalWalter Schumann
Conchoidal
Cleavage
Octahedral, perfect on {111}, parting on {011}
Fair in four directions forming octahedrons
Mohs Hardness
43.5-4
2
10
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Chemical Composition
CaF2
Cu 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references