Tenacity
-
Brittle
Solubility
-
Soluble
Durability
-
-
Specific Gravity
2.27-2.333.30-3.50
1
7.18
👆🏻
Fracture
-
Uneven, ConchoidalWalter Schumann, Conchoidal
Cleavage
Perfect
Perfect on {110}, poor on {101}, {001} rare
Mohs Hardness
5.5-65
2
10
👆🏻
Chemical Composition
Na 8Al 6Si 6O 24Cl 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Zn 4Si 2O 7(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references