Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.34-2.513.98-4.04
1
7.18
👆🏻
Fracture
-
Conchoidal
Cleavage
None
Imperfect, poor one {100}
Mohs Hardness
-99994.5-5
2
10
👆🏻
Chemical Composition
SiO2, Al2O3, FeO, MgO, CaO, K2O, Na2O
Zn 2(AsO 4)(OH) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references