- Designed for dance sport, the Shimmer Flat Backs adds multi-color vibrancy to the most popular colors in Swarovski's line-up. - Shimmer creates a unique light refractions similar to the Aurora Borealis (AB) effect, reflecting 3 shades in a single color. - JewelrySupply is a Swarovski Authorized Reseller, so you can be sure you will receive genuine SWAROVSKI ELEMENTS for your jewelry designs. **For further product information , please contact Chat Support**