This plot device, the 'stolen eye of the idol', was fresh and new when Wilkie Collins first coined it in his 1868 novel The Moonstone, but which has become rather shopworn with use since then.
Ventana: Ventana's Blue Moon Collection II section has a selection of pendants with the Chalice Well symbol in all sterling silver or sterling silver with rainbow moonstone.
If you don't see any moonstone rings suitable to what you're looking for, you may wish to purchase a loose moonstone and talk to a jeweler about creating a setting for you.
Meyer's description in the book calls for glittering stones, so you can use diamonds, cubic zirconia or even an alternative stone, such as rainbow moonstone.
It is oval cut, which is very common for moonstone, and the entire ring is about 18 carats in weight, meaning it is pretty large and sure to be noticed.
