Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.05-3.213.05-3.08
1
7.18
👆🏻
Fracture
Uneven, Subconchoidal, Splintery
Subconchoidal, Uneven, Conchoidal
Cleavage
Good on {110}, poor on {100}
Poor on {100}
Mohs Hardness
7.55
2
10
👆🏻
Chemical Composition
Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Mn2+ Al(PO 4)(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)