Tried to kind of replicate a boulder opal with this one, hence the wood left visible on the edges and the random blotches of a metallic bronzey color mixed in with the iridescence. I don't know if I succeeded, but it's still pretty, I think. Buy it and see for yourself and then get back with me on it.
Acrylic medium on wood cradle board, no frame necessary, ready to hang. I ship on Fridays and internationally.