Tenacity
Brittle
Brittle
Solubility
-
slightly water soluble and in hot hydrochloric acid
Durability
-
-
Specific Gravity
3.98-4.043.00-3.25
1
7.18
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Fracture
Conchoidal
Subconchoidal, Uneven, ConchoidalWalter Schumann
Cleavage
Imperfect, poor one {100}
Octahedral, perfect on {111}, parting on {011}
Mohs Hardness
4.5-54
2
10
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Chemical Composition
Zn 2(AsO 4)(OH) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
CaF2