Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.69-2.792.74-2.76
1
7.18
👆🏻
Fracture
Conchoidal
Uneven
Cleavage
Poor on {0001}
{010} Perfect, {001} Distinct
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
Fe3+ PO 4 · 2H 2OAnthony et al , Handbook of Mineralogy (2001)