1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.8 Fracture
White, Yellow, Pale blue, Brittle, Uneven
Conchoidal, Conchoidal, Gemstones of the world (2001)
1.9 Cleavage
Perfect on {100} and {010}, imperfect on {101}
Not Available
1.10 Mohs Hardness
1.12 Chemical Composition
Not Available
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)