Tenacity
Brittle
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2
2.58-2.64
Fracture
Conchoidal, Uneven, Brittle
Gemstones of the world (2001)
Cleavage
Imperfect on {001}, indistinct on {011}
Not Available
Chemical Composition
Not Available
SiO 2Walter Schumann , Gemstones of the world (2001)