Millions of years have shaped this stunning gemstone, directly from the Winton mines in Australia. This stunning rough opal is 100% natural and untreated. It features a beautiful play of color, with blue and green highlights emerging from the dark matrix, creating a stunning contrast. A truly stunning piece! Natural Boulder Opal Beautiful colors Rough Australian, Winton 11 cts - 2.2 grams 12 x 11 x 9 mm about UNTREATED! Lamp light condition! Photo wet piece 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