I have for sale a Large Parcel of Chunky Koroit Opal rough and Specimens from Koroit, Queensland Australia. These weigh 4473cts in total. They are Ironstone base material, different base colours and patterns through the parcel, with some Pattern including Green/Blue/Purples in places. Some are Specimen pieces, some will slice up and should cut some usable Cabs/Greeforms,. Great Carving pieces too. And Gamble material,  as you never quite know what you have until its sliced up and worked through,.,.  Lots here to work with,.  Thanks for looking,.,.,