1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
insoluble in common solvents
1.2 Durability
Not Available
Not Available
1.4 Specific Gravity
1.6 Fracture
Uneven, Conchoidal, UnevenArthur Thomas, Brittle
Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)
1.7 Cleavage
Perfect on {01 1 1}
Indiscernible
1.8 Mohs Hardness
1.12 Chemical Composition
Fe2+ CO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
SiO2