Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.60-3.613.95-4.10
1
7.18
👆🏻
Fracture
Conchoidal
Uneven
Cleavage
Imperfect/fair/absent
{110} Perfect, {110} Perfect, {110} Perfect
Mohs Hardness
8-8.53.5-4
2
10
👆🏻
Chemical Composition
Mg 3Al 8BeO 16Walter Schumann , Gemstones of the world (2001) More from other references
(Zn,Fe)SMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references