Crystal Lane flat back rhinestones are made of high-quality crystal glass with excellent machine cutting technology. These flat back gem rhinestones look glittering and shiny even from far away. Flatback gemstones can add shine and charm to your DIY crafts, art projects, fashion design projects and embellishments. Combining the flat rhinestones together to make your handcrafts unique, attractive and eye catching! Easy to Use: Simply add glue to the back of the flat back crystal rhinestones and stick it on your craft! Details: Available in multiple colorsSS16 (4 mm)1,440 pieces FlatbackGlue sold separatelyCrystal glass