1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.2 Solubility
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.13 Fracture
Uneven, Subconchoidal, UnevenArthur Thomas, Fibrous
Gemstones (2009), UnevenArthur Thomas, Gemstones (2009)
1.14 Cleavage
[110] perfect, [101] good, [010] distinct
Not Available
1.15 Mohs Hardness
1.16 Chemical Composition
Al 3(PO 4) 2(OH,F) 3 · 5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Al 2SiO 5Arthur Thomas , Gemstones (2009)