2 Nice Rough/Sliced Koroit Opal Specimens 642cts Some Purple/Green Fires/Patterns

I have for sale 2 Sliced/Rough Koroit Opal Nut sections from Queensland Australia. These weigh 642cts in total.  They are ironstone base material, one LArger Nut and the other multiple nuts/patterns in the one piece. Some Greens and Light Purple Fires in these.  Great Specimens for someone and may clean up Freeforms and similar too. Thanks for looking.