Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
4.32-4.483.43-3.44
1
7.18
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Fracture
Uneven, Subconchoidal, Conchoidal
-
Cleavage
{101}, good; {010}, poor
None Observed
Mohs Hardness
3.56.5-7
2
10
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Chemical Composition
Zn 2(AsO 4)(OH)Michael OâDonoghue , Gems, Sixth edition (2006)
Ca 2(Mg,Al) 6(Si,Al,B) 6O 20Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references