This is a quality natural boulder opal, which is polished and ready to be mounted or displayed.
It is freeform shaped, 15mm by 6mm, 1mm thick and 1.35 carats.
It has an opal layer over the rich brown ironstone backing and has a grey stripe down the centre, to give the appearance of a leaf or feather. On either side of this band are bright rolling flashes of pink, blue and green across its surface.
A bright and unusual quality stone.