Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.05-3.213.46-3.50
1
7.18
👆🏻
Fracture
Uneven, Subconchoidal, Splintery
Conchoidal
Cleavage
Good on {110}, poor on {100}
Perfect
Mohs Hardness
7.56-7
2
10
👆🏻
Chemical Composition
Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
MgAlBO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references