Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.34-3.443.05-3.08
1
7.18
👆🏻
Fracture
Conchoidal
Subconchoidal, Uneven, Conchoidal
Cleavage
{111} Indistinct, {111} Indistinct, {111} Indistinct
Poor on {100}
Mohs Hardness
8-8.55
2
10
👆🏻
Chemical Composition
(K,Cs)Al 4Be 4(B,Be) 12O 28Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Mn2+ Al(PO 4)(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)