18 Karat yellow Gold stud earrings with Black Opal crystals from Lightning Ridge NSW, stone size 5x4 mm.
Black opal is the most valuable of opals and comes from Lightning Ridge, New South Wales.
It is distinguished by the black or very dark body colour of the stone and shows colour within or on dark body tone. It can also be a crystal or opaque. It is highly sought after because of its beauty and rarity.