Crystal Setter Kit with Birthstone Crystals by ImpressArt. Add a spark of color to your hand-stamped pieces using ImpressArt’s Crystal Setter Kit with birthstone-colored crystals. Simply, stamp a round indentation with the crystal setter and secure a flat back crystal in place using G-S Hypo Cement or your favorite adhesive. Allow crystal to completely dry in place before wearing. For use on all soft metals including brass, copper, nickel silver, gold, silver, and aluminum. Kit Includes: 3 Crystal Punches (1.8mm, 2.5mm, and 4mm) and Birthstone Crystals 72 of each size (6 each of 12 colors).