Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.69-2.793.1-3.2
1
7.18
👆🏻
Fracture
Conchoidal
-
Cleavage
Poor on {0001}
Vitreous, pearly on cleavage
Mohs Hardness
5.5-6.53-4
2
10
👆🏻
Chemical Composition
KNa 2(Fe3+ ,Mn3+ ,Al) 2Li 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Fe2+ ,Mg,Mn2+ ) 3(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references