1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.2 Solubility
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.5 Fracture
Uneven, Subconchoidal, UnevenArthur Thomas, Fibrous
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle
1.6 Cleavage
[110] perfect, [101] good, [010] distinct
Good to perfect_usually N/A
1.7 Mohs Hardness
1.8 Chemical Composition
Al 3(PO 4) 2(OH,F) 3 · 5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
CuAl6(PO4)4(OH)8 • 4H2O