Venetian Beads: Ca dOro style 20mm medium heart beads, dark amethyst. While the color is gorgeous, it is extremely difficult to photograph. Ca dOros are also called crackle or cracked beads. High quality Venetian beads handmade from Murano glass. Beads from Gems2Behold offer a wholesale beads selection including highest quality glass beads, such as Murano Glass and Venetian beads, Seed beads, Swarovski, Delica, Lamp worked, also Ceramic, Gemstone and Metallic beads, and jewelry making tools and supplies, stringing materials and beading supplies.