Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.43-3.444.32-4.48
1
7.18
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Fracture
-
Uneven, Subconchoidal, Conchoidal
Cleavage
None Observed
{101}, good; {010}, poor
Mohs Hardness
6.5-73.5
2
10
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Chemical Composition
Ca 2(Mg,Al) 6(Si,Al,B) 6O 20Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Zn 2(AsO 4)(OH)Michael OâDonoghue , Gems, Sixth edition (2006)