Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.46-3.502.58-2.74
1
7.18
👆🏻
Fracture
Conchoidal
ConchoidalWalter Schumann, Splintery
Cleavage
Perfect
{100} Distinct, {110} Distinct
Mohs Hardness
6-75.5-6
2
10
👆🏻
Chemical Composition
MgAlBO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Na 4Al 3Si 9O 24Cl to Ca 4Al 6Si 6O 24(CO 3,SO 4)Walter Schumann , Gemstones of the world (2001) More from other references