Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.46-3.50-9999
1
7.18
👆🏻
Fracture
Conchoidal
-
Cleavage
Perfect
Perfect
Mohs Hardness
6-7-9999
2
10
👆🏻
Chemical Composition
MgAlBO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Ca2(Mg,Fe)3Al2(SiO4)4(OH)4