Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.34-3.443.98-4.04
1
7.18
👆🏻
Fracture
Conchoidal
Conchoidal
Cleavage
{111} Indistinct, {111} Indistinct, {111} Indistinct
Imperfect, poor one {100}
Mohs Hardness
8-8.54.5-5
2
10
👆🏻
Chemical Composition
(K,Cs)Al 4Be 4(B,Be) 12O 28Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Zn 2(AsO 4)(OH) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references