This lot contains a 9ct rough black Opal with very nice and bright blue colorplay with a little bit of purple. Color is deep and very good quality and will probably improve when this stone is polished or cut. Stone has no cracks but some sand in it. Stone is natural and untreated. Weight: 9ct Size: 20x12x6mm Origin; Lightning Ridge, Australia Shipping is registered and free worldwide, Track and Trace included.