Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.60-2.903.95-4.10
1
7.18
👆🏻
Fracture
Uneven, Conchoidal, Irregular
Uneven
Cleavage
Imperfect on {0001}
{110} Perfect, {110} Perfect, {110} Perfect
Mohs Hardness
7.5-83.5-4
2
10
👆🏻
Chemical Composition
Be3Al2Si6O18
(Zn,Fe)SMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references