Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.08-3.124.80-5.50
1
7.18
👆🏻
Fracture
ConchoidalWalter Schumann
-
Cleavage
{010} Perfect
Indistinct
Mohs Hardness
7.55-5.5
2
10
👆🏻
Chemical Composition
BeAlSiO 4(OH)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Ce,La,Nd,Th)PO 4Michael OâDonoghue , Gems, Sixth Edition (2006)