Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.813.69-3.81
1
7.18
👆🏻
Fracture
Conchoidal
Uneven, Conchoidal to uneven, ConchoidalWalter Schumann
Cleavage
{001} Perfect
Distinct on {110}, imperfect on {010}, poor on {001}
Mohs Hardness
4.5-58.5
2
10
👆🏻
Chemical Composition
NaAl 3(PO 4) 2(OH) 4 · 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
BeAl 2 O 4