1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.55-2.573.16-3.23
1
7.18
1.5 Fracture
Uneven, Uneven, Gems, Sixth Edition (2006)
Conchoidal, Uneven, Conchoidal, Brittle, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal to uneven
1.6 Cleavage
2,1 basal ; 2,1 prismatic ; 3,1 pinacoidal
[0001] indistinct, [1010] indistinct
1.7 Mohs Hardness
1.8 Chemical Composition
KAlSi3O8
Ca 5(PO 4) 3(F,OH,Cl)Walter Schumann , Gemstones of the world (2001) More from other references