XILION rose flatbacks in Sand Opal feature a soft yellow coloring with an opalescent glow. Mix them into your designs for touches of color or use them to accent fashion accessories. These flatbacks should not be used with a glue gun or super glue (cyanoacrylate), as these glues will damage the foil backing. For more information on how to take care of these lovely rhinestones, see the Swarovski Rhinestone Application Manuals.