Tenacity
-
-
Solubility
insoluble
-
Durability
-
-
Specific Gravity
2.363.26-3.36
1
7.18
👆🏻
Fracture
Uneven, Subconchoidal, Fibrous
Conchoidal
Cleavage
[110] perfect, [101] good, [010] distinct
Good on {100}
Mohs Hardness
3.5-46.5-7
2
10
👆🏻
Chemical Composition
Al 3(PO 4) 2(OH,F) 3 · 5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Ca,Fe,Mn,Mg) 3Al 2BSi 4O 15(OH)Walter Schumann , Gemstones of the world (2001) More from other references