2 Nice Koroit/Queensland Opal Rough/Sliced specimens 741cts Some Fires :)

I have for sale 2 Rough/Sliced Koroit Opal specimens from Queensland Australia. These weigh 741cts in total. They are Ironstone base Nuts/Section of Nuts, Great Patterns in these, banded with Skin on the outer edges. There is some Slight Fires in these, mixed into the pattern in places.  One has slightly more than the other. Great Practice material, or specimen pieces, Thanks for looking.,,.