B e a u t i f u l. A u s t r a l i a n. No ifs, buts or maybes. Solid 18k yellow gold Solid black crystal opal ring! Wonderful solid NATURAL 5.4mm X 4.0mm Lightning Ridge Australian crystal opal showing a 3.7 out of 5 bright green colours.All set into an elegant 4 pronged solid 18k yellow gold ring, what a beautiful gift this would be. This beautiful ring is currently size R , (US size 8.75) but for the lucky new owner, sizing between N and U (6.5 and 10.25) will be done free of charge. M15306 18k gold Australia opal ring - YouTube. We can accept credit cards and electronic transfers through. Our reputation is paramount, without it we would not have been in business and the opal industry since 1967. We treat our customers with the respect we would like them to treat us with. The item "GEORGOUS 18k YELLOW GOLD SOLID AUSTRALIAN LIGHTNING RIDGE OPAL RING (15306)" is in sale since Thursday, July 11, 2019. This item is in the category "Jewelry & Watches\Fine Jewelry\Fine Rings\Gemstone".com" and is located in Nerang, QLD. This item can be shipped worldwide.