Swarovski Shimmer Flatback Crystals are available in 15 colors, and 3 sizes of the iconic #2088 round flat back crystal stone. Shimmer Effect crystals are like Aurora Borealis 2.0: they conduct futuristic, mercurial waverings, encapsulating pure luminance and celestial color. The soft, yet elegant effect radiates 3 shades of a single color to accentuate the wearer’s every move. This durable effect gives you jaw-dropping glamour beneath the spotlight. The new Shimmer effect merges futuristic shimmer with bold crystal colors in nature-tech, boundary-transgressing hues.