Tenacity
-
Brittle
Solubility
-
slightly water soluble and in hot hydrochloric acid
Durability
-
-
Specific Gravity
3.43-3.443.00-3.25
1
7.18
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Fracture
-
Subconchoidal, Uneven, ConchoidalWalter Schumann
Cleavage
None Observed
Octahedral, perfect on {111}, parting on {011}
Mohs Hardness
6.5-74
2
10
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Chemical Composition
Ca 2(Mg,Al) 6(Si,Al,B) 6O 20Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
CaF2