Tenacity
-
-
Solubility
insoluble
-
Durability
-
-
Specific Gravity
2.363.84
1
7.18
👆🏻
Fracture
Uneven, Subconchoidal, Fibrous
Conchoidal
Cleavage
[110] perfect, [101] good, [010] distinct
none, may show indistinct parting
Mohs Hardness
3.5-47-7.5
2
10
👆🏻
Chemical Composition
Al 3(PO 4) 2(OH,F) 3 · 5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Mg,Fe)3Al2Si3O12