Rhinestone drills in diamond painting are faceted beads made from crystal or glass-like material that deliver an intense, gem-like sparkle. Unlike standard resin drills, rhinestones reflect light more sharply, creating a bold, eye-catching shine. They’re often used for accents or full crystal designs and are placed onto the adhesive canvas just like regular drills. Rhinestone drills are commonly available in round shapes and a wide range of vibrant colors.