Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
4.32-4.483.89-4.18
1
7.18
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Fracture
Uneven, Subconchoidal, Conchoidal
Conchoidal, Uneven
Cleavage
{101}, good; {010}, poor
{0001}, {11 2 0} imperfect
Mohs Hardness
3.55.5
2
10
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Chemical Composition
Zn 2(AsO 4)(OH)Michael OâDonoghue , Gems, Sixth edition (2006)
Zn 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references