Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.69-2.793.65-4.55
1
7.18
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Fracture
Conchoidal
Conchoidal
Cleavage
Poor on {0001}
None, but may exhibit slight parting
Mohs Hardness
5.5-6.57.5-8
2
10
👆🏻
Chemical Composition
KNa 2(Fe3+ ,Mn3+ ,Al) 2Li 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Mg,Zn)Al 2O 4Gemdat.org , Management Team (2012)