Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.23-3.262.33-2.37
1
7.18
👆🏻
Fracture
Conchoidal
Uneven
Cleavage
Perfect on {010} imperfect on {100}
Perfect on {001}, imperfect on {110}
Mohs Hardness
6.5-74.5-5
2
10
👆🏻
Chemical Composition
Mg 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)
(K,Na)Ca4Si8O20(F,OH)•8(H2O)