Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.08-2.163.85-3.94
1
7.18
👆🏻
Fracture
Irregular/uneven
Conchoidal, Uneven
Cleavage
distinct/good on {1011}
{010} Good, {100} Distinct
Mohs Hardness
4.55-5.5
2
10
👆🏻
Chemical Composition
CaAl 2Si 4O 12 -6H 2OArthur Thomas , Gemstones (2009)
(Mn2+ ,Fe2+ ,Mg,Ca) 2(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth Edition (2006)