Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.85-3.942.50-2.80
1
7.18
👆🏻
Fracture
Conchoidal, Uneven
-
Cleavage
{010} Good, {100} Distinct
Perfect
Mohs Hardness
5-5.55-6.5
2
10
👆🏻
Chemical Composition
(Mn2+ ,Fe2+ ,Mg,Ca) 2(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth Edition (2006)
Na 4(Al,Si) 12O 24Cl to Ca 4(Si,Al) 12O 24(CO 3,SO 4)Arthur Thomas , Gemstones (2009)