Swarovski crystal pearls are the first pearls in the world with a crystal core and an innovative pearl coating. They set new quality standards in crystal manufacturing and processing and are the best reproduction of natural pearls. This is the Swarovski 5817 1/2 Drilled Pearl, these are flat backed with a hole drilled halfway into the back of the pearl. These could also be glued on. This is a really pretty pearl. They are available up to size 16mm by special order if you need a different size.