Swarvoski Sew-on Stone.
CRYSTALLIZED Swarovski Elements 3200 Rivoli Rhinestones has a hole on each side of the rhinestone, shaped like a regular 1122 Rivoli, but flat on the back for attaching to costumes and garments. Available in a variety of sizes and colors.
The rivoli stone comes in flatback, flatback sew-on, and pointed back in both Swarovski crystal brand and Glitzstone brand. Both brands of rhinestones have many facets and are very brilliant under the lights. They come in many sizses and colors.