Tenacity
-
Brittle
Solubility
-
Soluble
Durability
-
-
Specific Gravity
2.55-2.653.30-3.50
1
7.18
👆🏻
Fracture
Subconchoidal, Conchoidal
Uneven, ConchoidalWalter Schumann, Conchoidal
Cleavage
[1010] Poor
Perfect on {110}, poor on {101}, {001} rare
Mohs Hardness
5-65
2
10
👆🏻
Chemical Composition
Na 3(Na,K)Al 4Si 4O 16Ulrich Henn and Claudio C.
Zn 4Si 2O 7(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references