2 Larger Koroit Opal Chunks/Rough Specimens 1131cts Part Nuts, Patterns some Fires

I have for sale 2 Larger Koroit Opals Specimens from Queensland Australia. These 2 weigh 1131cts in total. They are Mixed ironstones making up 2 Sections of nuts. The larger one is a half a nut with intricate patterns running around it and very slight Fires showing in places..  The other with the redder Ironstones is a Quater Nut, it has a Band of Green/Blue Fires running through it.. Will need slicing up, and rubbing down to see what there,..,  Good sizes for specimens aswell,.,.  Thanks for looking,..,.