Tenacity
-
Brittle
Solubility
-
Soluble
Durability
-
-
Specific Gravity
2.34-2.513.30-3.50
1
7.18
👆🏻
Fracture
-
Uneven, ConchoidalWalter Schumann, Conchoidal
Cleavage
None
Perfect on {110}, poor on {101}, {001} rare
Mohs Hardness
-99995
2
10
👆🏻
Chemical Composition
SiO2, Al2O3, FeO, MgO, CaO, K2O, Na2O
Zn 4Si 2O 7(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references