On Sale Now Gorgeous natural Spiny Oyster Shell comes in colors of deep Purples, brilliant Oranges and rich Reds. The nature of working with natural color materials is the variation that can be found within each species. Stunning Inlay Rings in Orange Spiny Shell, Purple Spiny Shell and Red Spiny Shell. Can't decide? We offer an wonderful solution with Multi Color Spiny Shell Channel Inlay Rings.