1 Physical Properties
1.1 Tenacity
1.2 Solubility
insoluble in common solvents
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.5 Fracture
Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)
Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Metallic
1.6 Cleavage
Indiscernible
Good/distinct on [210]
1.7 Mohs Hardness
1.13 Chemical Composition
SiO2
Mg 2Si 2O 6Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references