Preciosa Round Pearls 1H are a superb imitation of natural or cultivated pearls. They have a crystal ball core which has several coats of nacre applied, using a technology that is very similar to the natural production of pearlsPreciosa Nacre Pearls have a gloss on them which makes them indistinguishable from genuine pearls. They are also highly resistant to abrasion, UV radiation, and to alcohol-based perfumes. Available in a variety of sizes and colours.