Swarovski Pear Shape Flatback Crystal Art.2300 (Glue on Gem) are loose crystal components with platinum foiling on the back (mirrored), they can be applied with glue (such Gem Tac glue) to different materials and easy to glue on. Perfect for adding that sparkle to fashion clothing and wedding dresses, dance ware, bling shoes, bling phone or iPad cases, bling nail (nail art), greeting cards or other decorative items.