1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.5 Fracture
Gems, Sixth Edition (2006)
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), (e.g. graphite).
1.6 Cleavage
Indiscernible
{110} Distinct, {001} Indistinct, {100} Indistinct
1.7 Mohs Hardness
1.8 Chemical Composition
Quartz: SiO2 Rutile: TiO2
PbCrO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references