Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.69-2.793.70-3.90
1
7.18
👆🏻
Fracture
Conchoidal
Conchoidal
Cleavage
Poor on {0001}
Perfect on {011}, fair on {100}, poor on {110}
Mohs Hardness
5.5-6.53.5-4
2
10
👆🏻
Chemical Composition
KNa 2(Fe3+ ,Mn3+ ,Al) 2Li 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Cu 3(OH) 2(CO 3) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references