Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.65-2.903.34-3.44
1
7.18
👆🏻
Fracture
-
Conchoidal
Cleavage
{001} Perfect
{111} Indistinct, {111} Indistinct, {111} Indistinct
Mohs Hardness
-99998-8.5
2
10
👆🏻
Chemical Composition
Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(K,Cs)Al 4Be 4(B,Be) 12O 28Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references