The iconic Open Hearts design embraces a brilliant paraiba blue Swarovski topaz in this romantic necklace for her. Crafted in sterling silver. Suspended from an 18" box chain secured with a lobster clasp. Made with genuine topaz that has been permanently treated by Swarovski's patented Thermal Color Fusion™ process. Thermal Color Fusion™ is a color treatment process that creates a permanent ceramic color layer on the topaz.