1 Physical Properties
1.2 Tenacity
Not Available
Not Available
1.7 Solubility
Not Available
Not Available
1.8 Durability
Not Available
Not Available
1.9 Specific Gravity
1.97-2.223.85-3.94
1
7.18
1.10 Fracture
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), Uneven
1.11 Cleavage
Not Available
{010} Good, {100} Distinct
1.12 Mohs Hardness
1.13 Chemical Composition
SiO 2 + H 2OUlrich Henn and Claudio C.
(Mn2+ ,Fe2+ ,Mg,Ca) 2(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth Edition (2006)