Agate
SiO2
Cryptocrystalline Silica
Silicate Group
Trigonal System
Hardness: 6.5-7
Often banded; Colorless, white to grey, light blue, orange to red, black
Agate
SiO2
Cryptocrystalline Silica
Silicate Group
Trigonal System
Hardness: 6.5-7
Often banded; Colorless, white to grey, light blue, orange to red, black