Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.98-4.043.76-3.77
1
7.18
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Fracture
Conchoidal
-
Cleavage
Imperfect, poor one {100}
{110} Perfect, {110} Perfect
Mohs Hardness
4.5-55-6
2
10
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Chemical Composition
Zn 2(AsO 4)(OH) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Fe,Mn) 7Si 7O 21Ulrich Henn and Claudio C.