Tenacity
-
-
Solubility
insoluble
insoluble in water
Durability
-
-
Specific Gravity
2.362.51-2.63
1
7.18
👆🏻
Fracture
Uneven, Subconchoidal, Fibrous
Fibrous
Cleavage
[110] perfect, [101] good, [010] distinct
Perfect basal
Mohs Hardness
3.5-42.5-4.5
2
10
👆🏻
Chemical Composition
Al 3(PO 4) 2(OH,F) 3 · 5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Mg 3(Si 2O 5)(OH) 4Gemdat.org , Management Team (2012)