Tenacity
Brittle
Brittle
Solubility
slightly water soluble and in hot hydrochloric acid
-
Durability
-
-
Specific Gravity
3.00-3.254.32-4.48
1
7.18
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Fracture
Subconchoidal, Uneven, ConchoidalWalter Schumann
Uneven, Subconchoidal, Conchoidal
Cleavage
Octahedral, perfect on {111}, parting on {011}
{101}, good; {010}, poor
Mohs Hardness
43.5
2
10
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Chemical Composition
CaF2
Zn 2(AsO 4)(OH)Michael OâDonoghue , Gems, Sixth edition (2006)