Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.23-3.263.50-3.60
1
7.18
👆🏻
Fracture
Conchoidal
Uneven
Cleavage
Perfect on {010} imperfect on {100}
Good on {110}, (110) ^ (1 1 0) ≈87°; parting on {100}
Mohs Hardness
6.5-76
2
10
👆🏻
Chemical Composition
Mg 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)
(Na,Fe,Ca)Si 2O 6Ulrich Henn and Claudio C.