Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.95-4.103.25
1
7.18
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Fracture
Uneven
-
Cleavage
{110} Perfect, {110} Perfect, {110} Perfect
Imperfect in one direction
Mohs Hardness
3.5-45-5.5
2
10
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Chemical Composition
(Zn,Fe)SMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
CaCuAlSi 2O 6(OH) 3Michael OâDonoghue , Gems, Sixth Edition (2006)