Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
4.32-4.484.95-5.0
1
7.18
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Fracture
Uneven, Subconchoidal, Conchoidal
Uneven
Cleavage
{101}, good; {010}, poor
Imperfect to indistinct on {10 1 0}, parting on {0001}
Mohs Hardness
3.54-5
2
10
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Chemical Composition
Zn 2(AsO 4)(OH)Michael OâDonoghue , Gems, Sixth edition (2006)
(Ce,La)(CO 3)FMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references