Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.812.72-2.75
1
7.18
👆🏻
Fracture
Conchoidal
Uneven
Cleavage
{001} Perfect
Perfect on [001], 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
Ca(70-90%)Na(30-10%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)