SWAROVSKI Flat Back Rhinestones (no Hot Fix) SHIMMER EFFECTS The Swarovski Flat Back Rhinestone in TOPAZ SHIMMER features a beautiful Iridescent dark orange coloring with the "Shimmer" Effect Coating with Platinum-coloring Pro Foiling, which creates a wonderful shining effect under the lights. The Shimmer effect adds more brilliance, color vibrancy and unique light refractions to your costumes. Softer, more elegant shimmer that radiates three shades of a single color. Use one of our adhesives to attach your rhinestones to your project or you can use metal settings as well. Our Rhinestone Color Chart is a great tool to assist you in selecting your rhinestone colors and sizes.