3 Nice Cut/Polished Koroit/Yowah Opal Ring Stones 17.5cts Multicolour Fires Qld Australia

I have for sale 3 Nice Koroit/Yowah Opals from Queensland Australia. These weigh 17.5cts in total. They are all Ironstone Nuts, 2 from Koroit, NIce High dome Blue/Green Veins, and the flatter Oval with Multicolour Red/Blue/Gold/Greens all through it. The last is a Yowah Nut, Blue/Green Pinfires in White/Milky Opal. All 3 will make Great ring stones or similar. Great Fires to look at and work with. Thanks for looking.