I cut and polished the opal myself and the colours are lovely, red, orange, green and blue in what looks like a river of colours running through the natural ironstone. I've made the bezel surrounding the opal to look like wave splashes (I think it does). The backplate has been textured to complement the design and set off with a modern shaped bail big enough to accommodate most chains.
I will take some more photos to try and get the best of the opal colours, as these dont quite show what I see.
The opal pendant measures approx. 30mm across at the widest point, 35mm in length and 6mm deep (the opal).
Thanks for stopping for a look.