Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.19-3.231.65-1.99
1
7.18
👆🏻
Fracture
Conchoidal
Uneven
Cleavage
{110} good
{010} Perfect, {110} Perfect
Mohs Hardness
5-62-2.5
2
10
👆🏻
Chemical Composition
KNa 2Li(Fe2+ ,Mn2+ ) 2Ti 2Si 8O 24Michael OâDonoghue , Gems, Sixth Edition (2006)
NaCaB 5O 6(OH) 6 · 5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)