Directly from the Lightning Ridge mines in Australia, a beautiful lot of rough opals with multicolored flashes, 100% natural and untreated. Natural Opal Rough Australian, Lightning Ridge Multicolor 13 Pieces from 6 to 17 mm about 20 cts - 4 grams UNTREATED! The properties of Opal bring joy and a sense of happiness, increase the joy of living, stimulate artistic creativity and imagination. Photo wet pieces! the piece for sale is what you see in photos! Lamp light condition! please be careful with the description and measures Standard shipping ( 2-7 days for Italy ) ( 10-20 days for Europe ) ( 15-40 days for rest of the world ) if you want fast shipping, please contact me immediately after the auction win