Tenacity
Brittle
-
Solubility
Soluble
-
Durability
-
-
Specific Gravity
3.30-3.502.6-3.3
1
7.18
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Fracture
Uneven, ConchoidalWalter Schumann, Conchoidal
Lamellar
Cleavage
Perfect on {110}, poor on {101}, {001} rare
Perfect 001
Mohs Hardness
52-2.5
2
10
👆🏻
Chemical Composition
Zn 4Si 2O 7(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Mg,Fe)3(Si,Al)4O10(OH)2·(Mg,Fe)3(OH)6