Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.0-3.53.85-3.94
1
7.18
👆🏻
Fracture
Uneven
Conchoidal, Uneven
Cleavage
Perfect
{010} Good, {100} Distinct
Mohs Hardness
5-65-5.5
2
10
👆🏻
Chemical Composition
Na(CaNa)(Mg,Fe++)5(Si8O22)(OH)2
(Mn2+ ,Fe2+ ,Mg,Ca) 2(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth Edition (2006)