Rare and beautiful untreated Ethiopian black opal with an extraordinary rainbow play of color. A collector's item! LINK VIDEO: https://www.youtube.com/watch?v=rIPKYQRSk1c Natural Black opal rough 1 piece (31 x 18 x 21 mm) about Ethiopian Welo Untreated! Top Colors Multicolor flash fire 5.30 grams - 26.5 cts Photo with lamp light condition! beautiful colors also sunlight! The properties of Opal bring joy and a sense of happiness, increase the joy of living, stimulate artistic creatività and imagination. It is believed that certain gemstones and minerals have beneficial health and spiritual properties. Catawiki cannot guarantee or be held liable for these suggested attributes which have no scientific evidence. Standard shipping ( 2-7 days for Italy ) ( 10-20 days for Europe ) ( 15-45 days for rest of the world )