Tenacity
Brittle
-
Solubility
slightly water soluble and in hot hydrochloric acid
-
Durability
-
-
Specific Gravity
3.00-3.256.30-6.39
1
7.18
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Fracture
Subconchoidal, Uneven, ConchoidalWalter Schumann
Conchoidal
Cleavage
Octahedral, perfect on {111}, parting on {011}
[001] good, [210] distinct
Mohs Hardness
43-3.5
2
10
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Chemical Composition
CaF2
PbSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references