A lovely piece with stunning rainbow flash, p. Erfect for setting in jewellery or adding to a gem collection. 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.9.88ct Welo Opal Cabochon Rainbow Blaze Natural Precious Ethiopian Opal Video. The item "9.88ct Welo Opal Cabochon Rainbow Blaze Natural Precious Ethiopian Opal Video" is in sale since Friday, April 16, 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.