Directly from the Winton mines in Australia, this lot of 17 rough boulder opals totaling 245 carats, 100% natural, with no treatment, features multicolored fires. Natural Opal Rough Australian, Winton 17 Pieces Pieces from 12 to 31 mm about 49 grams - 245 cts Multicolors Fire UNTREATED! Photo wet piece the piece for sale is what you see in photos! Lamp light condition! UNTREATED! This is a large lot of Australian boulder opal 200 grams, small, medium and large pieces. 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