The surface of Swarovski Pearls are harder than fresh or salt water pearls, so the finish does not scratch or wear nearly as quickly or easily. These pearls are not affected by body lotions, oils, perfumes, or hair spray. Swarovski pearls maintain their beauty, passing the test of time, even when strung next to other beads, such as crystals, gemstones, etc. Just wipe with a soft damp cloth or use dish liquid when heavily soiled.