Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.813.05-3.21
1
7.18
👆🏻
Fracture
Conchoidal
Uneven, Subconchoidal, Splintery
Cleavage
{001} Perfect
Good on {110}, poor on {100}
Mohs Hardness
4.5-57.5
2
10
👆🏻
Chemical Composition
NaAl 3(PO 4) 2(OH) 4 · 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references