Directly from the Ethiopian mines, this stunning, "spectacular" specimen of natural rough opal is an extremely rare piece in the Contraluz pattern, featuring a fantastic play of rainbow colors and the inclusion of a dark phantom, making it a truly spectacular and rare gem, perfect for true collectors! Copy the link below and paste it into your search engine to view the video of this magnificent black opal. LINK VIDEO: https://www.youtube.com/watch?v=WwobPQkZYns Contraluz - (the contraluz effect occurs when the light is inserted inside or laterally) pieces with contraluz effect are rare. Natural opal rough Crystal, contraluz Very rare piece with dark phantom Ethiopian Welo Untreated! Beautiful Color Multicolor flash fire 1 piece (38 x 25 x 24 mm) about 22.18 grams - 110.9 cts Opal acts as a prism within the aura, bringing a full spectrum of Light energy to the system, soothing and clearing the emotional body, and boosting the will to live and the joy of one's earthly existence. Photo with lamp light condition! beautiful colors also sunlight! Photo wet piece Keep moist 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 )