Tenacity
-
Brittle
Solubility
-
Soluble
Durability
-
-
Specific Gravity
2.25-2.403.30-3.50
1
7.18
👆🏻
Fracture
-
Uneven, ConchoidalWalter Schumann, Conchoidal
Cleavage
perfect on {010}; good on {100}
Perfect on {110}, poor on {101}, {001} rare
Mohs Hardness
5-5.55
2
10
👆🏻
Chemical Composition
NaCa 2Al 5Si 5O 20 · 6H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Zn 4Si 2O 7(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references