Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
4.32-4.482.81
1
7.18
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Fracture
Uneven, Subconchoidal, Conchoidal
Conchoidal
Cleavage
{101}, good; {010}, poor
{001} Perfect
Mohs Hardness
3.54.5-5
2
10
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Chemical Composition
Zn 2(AsO 4)(OH)Michael OâDonoghue , Gems, Sixth edition (2006)
NaAl 3(PO 4) 2(OH) 4 · 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references