Round Flat back Hot-Fix Rhinestones for Alexandrite making,Similar to Austrian Swarovski Crystal,Whole Sizes & Color Round Flat back ... rhinestones is definitely the fastest, easiest, and most economical way to get your project out of the shop and onto the stage ... :Crystal, clear, diamond-like* Genuine Crystal: Amethyst, SS 6 to SS 34, Multi-faceted Cut, Silver Foil Backed, Flatback Rhinestones ...