Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.60-3.613.05-3.21
1
7.18
👆🏻
Fracture
Conchoidal
Uneven, Subconchoidal, Splintery
Cleavage
Imperfect/fair/absent
Good on {110}, poor on {100}
Mohs Hardness
8-8.57.5
2
10
👆🏻
Chemical Composition
Mg 3Al 8BeO 16Walter Schumann , Gemstones of the world (2001) More from other references
Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references