In the Middle East puzzle rings were worn by wives to show faithfulness to their husbands. It's made up of many rings that when worn correctly, form a band ring. The complexity of this design meant that they were rarely taken off.
Coast Rings by Damson Jewellery. The coast ring is composed of matt and polished interlocking halves. The join of the ring is created from a stretch of coastline you choose yourself, making your ring unique!