Quality Cut/Polished Koroit Opal Cab 61.1cts Blue/Green Patterns/Veins Queensland Au

I have for sale a very nice and unique Koroit Opal Cab.  This one weighs 61.1cts and is 39x22x7mm. Oval cut piece with excellent colour/patterns on both sides. This one has the Nut banding/concentric layers with Blue/Green Fires mixed through the piece in mostly small Veins/Pinfires and then the larger more unusual "U" shape in the middle. Similar on the back. Never seen one quite like this before. It will make a superb pendant, or add to a collection.  Thanks for looking.