Rainbow Moonstone is such a beautiful stone. As you move it around in the light, you can see lots of gorgeous colours within the pearly white. Here, I have set it within an oval loop of silver wire, with a silver leaf soldered onto a loop on the other end of the ring.  The ring is around a size O but can be made slightly smaller or larger by pushing or pulling the two ends together/apart.

Adjustable Rainbow Moonstone Ring