Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.69-3.813.07-3.13
1
7.18
👆🏻
Fracture
Uneven, Conchoidal to uneven, ConchoidalWalter Schumann
Conchoidal, Uneven
Cleavage
Distinct on {110}, imperfect on {010}, poor on {001}
{100} Perfect, {010} Distinct, {102} Distinct
Mohs Hardness
8.53-3.5
2
10
👆🏻
Chemical Composition
BeAl 2 O 4
Zn 2(Fe2+ ,Mn2+ )(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references