SWAROVSKI ELEMENTS flatbacks are here! Also known as rhinestones, these components are perfect for adding sparkle to scrapbooks, flip-flops, clothing, greeting cards, cell phones and more! The Heliotrope color presents a gorgeous purple shade that turns into a rich blue when it catches the light. Please note that when using flatbacks, you should never use a glue gun or super glue as they will damage the foil backing on the rhinestones.