A lovely piece packed with rainbow fire throughout the body. See the video for a better look. The colours are varied and change according to the light source and angle. Natural & untreated with no use of water or oils. 8.7ct Welo Precious Opal Cabochon Rainbow Blaze AAA Natural Ethiopian Opal Video. The item "8.7ct Welo Precious Opal Cabochon Rainbow Blaze AAA Natural Ethiopian Opal Video" is in sale since Tuesday, April 6, 2021. This item is in the category "Jewellery & Watches\Loose Diamonds & Gemstones\Opal\White & Precious Opals". The seller is "clearwatergemsuk" and is located in London. This item can be shipped worldwide.