1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.4 Solubility
Not Available
Not Available
1.8 Durability
Not Available
Not Available
1.11 Specific Gravity
3.26-3.363.13-3.26
1
7.18
1.5 Fracture
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009)
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
1.7 Cleavage
Good on {100}
Not Available
1.9 Mohs Hardness
1.16 Chemical Composition
(Ca,Fe,Mn,Mg) 3Al 2BSi 4O 15(OH)Walter Schumann , Gemstones of the world (2001) More from other references
Ca 5(F,Cl)(PO 4) 3Arthur Thomas , Gemstones (2009)