Nice Rubbed/Rough Koroit Opal Specimen 170.5cts Green/Blue Pattern Qld Au

I have for sale a Nice Rubbed Koroit Opal specimen from Queensland Australia. This one weighs 170.5cts and is 57x23x14mm. It is Light Caramel coloured Ironstone with slightly Darker brows around it. There is some Opal sat in a pattern on the hump at one end of the stone. Some Greens/Blues , slight Gold/Pinks. Great Specimen, or cut the stone out at one end for a pendant or similar. Thanks for looking,.,.,.