Ring sets are always great. You have them in all styles and sizes.
The Stackable Coral ring set by Tosca is a great example.
It's a set of three rings with a coral texture. Each ring has another stone. The tings are set with a pearl, blue and pink zirconia. And of course, you can wear them seperately. That's the other fun part of ring sets like this one. Wear them all, just to or only one ring.