Nice Rough/Sliced/Rubbed Boulder Opal 469cts Winton, Queensland Blue/Greens

I have for sale a nice quality Boulder Opal Rub/Rough Parcel from near Winton, Queensland Australia. These 4 pieces are Ironstone base with crystal/milky opal on the faces. They weigh 469cts in total. One has beaurtiful stripes in clearer crystal, chunky at one end but with a natural fracture. The others have Blue/Greens, P+C, patches of colour. They will make lovely, and big freeform pendants or similar. Or add to a collection.  Thanks for looking.