Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.44-2.623.87-4.14
1
7.18
👆🏻
Fracture
Uneven
Subconchoidal, Conchoidal
Cleavage
Indiscernible
Poor on {120}, in traces on {001}
Mohs Hardness
2.5-5.55.5-6
2
10
👆🏻
Chemical Composition
H 4Mg 3Si 2O 9Walter Schumann , Gemstones of the world (2001) More from other references
TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references