Opal fire
German: Feueropal
Chemical: Hydrated silica. SiO2·nH2O.
Crystal system: Amorphous.
Color: colorless, white, yellow, red, orange, green, brown, black, blue, pink; irregular veins, in masses, in nodules.
Opal fire
German: Feueropal
Chemical: Hydrated silica. SiO2·nH2O.
Crystal system: Amorphous.
Color: colorless, white, yellow, red, orange, green, brown, black, blue, pink; irregular veins, in masses, in nodules.