Tenacity
-
Brittle
Solubility
Insoluble in acids
Soluble
Durability
-
-
Specific Gravity
4.20-4.303.30-3.50
1
7.18
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Fracture
Uneven, Conchoidal
Uneven, ConchoidalWalter Schumann, Conchoidal
Cleavage
{110} good, 100 moderate, parting on {092} and {011}
Perfect on {110}, poor on {101}, {001} rare
Mohs Hardness
6-6.55
2
10
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Chemical Composition
TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Zn 4Si 2O 7(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references