Tenacity
-
Brittle
Solubility
insoluble
-
Durability
-
-
Specific Gravity
2.362.60-2.90
1
7.18
👆🏻
Fracture
Uneven, Subconchoidal, Fibrous
Uneven, Conchoidal, Irregular
Cleavage
[110] perfect, [101] good, [010] distinct
Imperfect on {0001}
Mohs Hardness
3.5-47.5-8
2
10
👆🏻
Chemical Composition
Al 3(PO 4) 2(OH,F) 3 · 5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Be3Al2Si6O18