Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.812.60-2.65
1
7.18
👆🏻
Fracture
Conchoidal
Uneven, Conchoidal
Cleavage
{001} Perfect
Perfect on {001}, very good on {010}, imperfect on {110}
Mohs Hardness
4.5-56-6.5
2
10
👆🏻
Chemical Composition
NaAl 3(PO 4) 2(OH) 4 · 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
NaAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)