Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.82-4.003.85-3.94
1
7.18
👆🏻
Fracture
-
Conchoidal, Uneven
Cleavage
{???} Indistinct
{010} Good, {100} Distinct
Mohs Hardness
5.55-5.5
2
10
👆🏻
Chemical Composition
Mn2+9(SiO 4) 4(OH,F) 2Anthony et al , Handbook of mineralogy (2001)
(Mn2+ ,Fe2+ ,Mg,Ca) 2(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth Edition (2006)