Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.69-2.792.9-3.5
1
7.18
👆🏻
Fracture
Conchoidal
Conchoidal
Cleavage
Poor on {0001}
{110} Perfect, {???} Distinct, {???} Distinct
Mohs Hardness
5.5-6.55.5-6
2
10
👆🏻
Chemical Composition
KNa 2(Fe3+ ,Mn3+ ,Al) 2Li 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Mg,Fe2+ ) 2(Mg,Fe2+ ) 5Si 8O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)