1 Physical Properties
1.1 Tenacity
1.2 Solubility
1.2 Durability
Not Available
Not Available
1.4 Specific Gravity
1.15 Fracture
Conchoidal, Brittle, Conchoidal
Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)
1.16 Cleavage
{010} perfect, {110} distinct, {100} in traces
{0110} Indistinct
1.17 Mohs Hardness
1.18 Chemical Composition
AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references
SiO2