Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.812.90-2.98
1
7.18
👆🏻
Fracture
Conchoidal
Conchoidal, ConchoidalWalter Schumann
Cleavage
{001} Perfect
Distinct on {11 2 0}, imperfect on {10 1 1}
Mohs Hardness
4.5-57.5-8
2
10
👆🏻
Chemical Composition
NaAl 3(PO 4) 2(OH) 4 · 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Be 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references