Amethyst
In stock
Category : Mineral variety
Chemical formula : Silica (silicon dioxide, SiO2)
Color : Purple, violet
Refractive index : nω = 1.543-1.553 nε = 1.552-1.554
Cleavage : None
Hardness : 7-lower (Variable)
Luster : Glossy
Specific gravity : 2.65 constant (variable)
Optical properties : Uniaxial
Group: Amethyst
