Black Opal is Australia’s national gemstone. Found in the Lightning Ridge area in northwestern New South Wales, black opals are natural, solid stones that absorb scattered white light, giving it brilliant spectral colors.
Opal: " For in them you shall see the living fire of the ruby, the glorious purple of the amethyst, the sea-green of the emerald, all glittering together in an incredible mixture of light." ~ Roman Pliny the Elder on Opal, Century AD--iridescence
Fine, Large Andamooka Matrix Opal Andamooka, South Australia, Australia This large oval cabochon displays a rich overall pattern of electric blue and vivid green play-of-color within the black matrix. Weighing approximately carats and measuring x x