Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.74-2.763.85-3.94
1
7.18
👆🏻
Fracture
Uneven
Conchoidal, Uneven
Cleavage
{010} Perfect, {001} Distinct
{010} Good, {100} Distinct
Mohs Hardness
3.5-45-5.5
2
10
👆🏻
Chemical Composition
Fe3+ PO 4 · 2H 2OAnthony et al , Handbook of Mineralogy (2001)
(Mn2+ ,Fe2+ ,Mg,Ca) 2(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth Edition (2006)