Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.69-2.796.50-7.00
1
7.18
👆🏻
Fracture
Conchoidal
Irregular, Conchoidal
Cleavage
Poor on {0001}
On {011}, distinct; on {001}, {013}, indistinct
Mohs Hardness
5.5-6.53
2
10
👆🏻
Chemical Composition
KNa 2(Fe3+ ,Mn3+ ,Al) 2Li 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
PbMoO 4Walter Schumann , Gemstones of the world (2001)