Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.815.50-5.90
1
7.18
👆🏻
Fracture
Conchoidal
Conchoidal
Cleavage
{001} Perfect
On {10 1 0}, perfect; parting on {000 1 }
Mohs Hardness
4.5-54
2
10
👆🏻
Chemical Composition
NaAl 3(PO 4) 2(OH) 4 · 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Zn,Mn2+ )OMichael OâDonoghue , Gems, Sixth Edition (2006)