Tenacity
Brittle
Brittle
Solubility
-
slightly water soluble and in hot hydrochloric acid
Durability
-
-
Specific Gravity
2.97-3.033.00-3.25
1
7.18
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Fracture
Uneven, ConchoidalWalter Schumann, Conchoidal
Subconchoidal, Uneven, ConchoidalWalter Schumann
Cleavage
{001} Poor
Octahedral, perfect on {111}, parting on {011}
Mohs Hardness
74
2
10
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Chemical Composition
CaB 2(SiO 4) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
CaF2