Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.24-2.295.85-6.15
1
7.18
👆🏻
Fracture
Uneven, Subconchoidal, Conchoidal
Conchoidal
Cleavage
Very poor [100]
Fair in four directions forming octahedrons
Mohs Hardness
5-5.53.5-4
2
10
👆🏻
Chemical Composition
NaAlSi 2O 6 · H 2OMichael OâDonoghue , Gems, Sixth edition (2006) More from other references
Cu 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references