1 Physical Properties
2.2 Tenacity
Not Available
Not Available
2.3 Solubility
2.4 Durability
Not Available
Not Available
2.6 Specific Gravity
3.85-3.943.64-3.66
1
7.18
2.9 Fracture
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), Uneven
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)
2.10 Cleavage
{010} Good, {100} Distinct
None, but may exhibit slight parting
2.11 Mohs Hardness
2.12 Chemical Composition
(Mn2+ ,Fe2+ ,Mg,Ca) 2(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth Edition (2006)
MgAl2O4