Green Violet Turquoise 29ct Natural Australian Solid Koroit Boulder Opal. 35.4mm x 19.0mm x 5.8mm thick. This natural australian solid koroit boulder opal has colors of green, violet and turquoise which fill the veins between the stone. The colors flash and streak nicely with rotation of the opal and there is also play of color.We pride ourselves in offering you boulder opal with bright gem colours. We go the extra mile to offer top quality opals in all price ranges. The item "Green Violet Turquoise 29ct Natural Australian Solid Koroit Boulder Opal Video" is in sale since Tuesday, May 22, 2018. This item is in the category "Jewelry & Watches\Loose Diamonds & Gemstones\Loose Gemstones\Opal\Boulder Opals". The seller is "opals-downunder" and is located in Menai, NSW. This item can be shipped to North, South, or Latin America, all countries in Europe, China, Japan, Australia.