Opaline may refer to: Opaline, a group of protists Opaline, an album by Dishwalla Opaline glass, decorative French glass Opaline silica: an amorphous or cryptocrystalline form of hydrated silica SiO2·nH2O (Opal) Opaline, a colour mutation of the budgerigar, Melopsittacus undulatus