Tenacity
Brittle
Brittle
Solubility
slightly water soluble and in hot hydrochloric acid
-
Durability
-
-
Specific Gravity
3.00-3.255.9-6.3
1
7.18
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Fracture
Subconchoidal, Uneven, ConchoidalWalter Schumann
Conchoidal, Uneven
Cleavage
Octahedral, perfect on {111}, parting on {011}
On {101}, distinct; on {112}, interrupted; on {001}, indistinct
Mohs Hardness
44.5-5
2
10
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Chemical Composition
CaF2
CaWO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references