SWAROVSKI Flat Back Rhinestones (no Hot Fix) METALLIC EFFECTS The Swarovski Flat Back Rhinestone in CRYSTAL AURUM features a beautiful bright, real metallic gold, coloring with a silver foil backing, which creates a wonderful shining effect under the lights. 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. Let your creativity shine by using all the various articles together on your project. They are sparkle beautifully under the lights.