Tenacity
-
-
Solubility
insoluble
-
Durability
-
-
Specific Gravity
2.363.70-4.10
1
7.18
👆🏻
Fracture
Uneven, Subconchoidal, Fibrous
Conchoidal
Cleavage
[110] perfect, [101] good, [010] distinct
Indistinct
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 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)