Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.003.85-3.94
1
7.18
👆🏻
Fracture
Uneven, Splintery
Conchoidal, Uneven
Cleavage
perfect along {110}.
{010} Good, {100} Distinct
Mohs Hardness
5-65-5.5
2
10
👆🏻
Chemical Composition
Ca 2(Mg,Fe) 5Si 8O 22(OH) 2Ulrich Henn and Claudio C.
(Mn2+ ,Fe2+ ,Mg,Ca) 2(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth Edition (2006)