Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.85-3.942.55-2.70
1
7.18
👆🏻
Fracture
Conchoidal, Uneven
-
Cleavage
{010} Good, {100} Distinct
None
Mohs Hardness
5-5.56.5-7
2
10
👆🏻
Chemical Composition
(Mn2+ ,Fe2+ ,Mg,Ca) 2(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth Edition (2006)
SiO 2 (with trace Cr minerals) Gemdat.org , Management Team (2012)