Tenacity
-
Brittle
Solubility
-
Readily soluble in HF
Durability
-
-
Specific Gravity
3.85-3.942.86-2.94
1
7.18
👆🏻
Fracture
Conchoidal, Uneven
Conchoidal, Uneven
Cleavage
{010} Good, {100} Distinct
None observed
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)
(Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references