Tenacity
-
-
Solubility
-
Partially soluble in water
Durability
-
-
Specific Gravity
2.69-2.791.77
1
7.18
👆🏻
Fracture
Conchoidal
-
Cleavage
Poor on {0001}
Perfect on {10 1 0}
Mohs Hardness
5.5-6.52-2.5
2
10
👆🏻
Chemical Composition
KNa 2(Fe3+ ,Mn3+ ,Al) 2Li 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)