Large Hole Beads (Greek Ceramic Beads, glazed Sapphire): Ceramic bead ovals (olives), glazed Sapphire, 15mm. These ceramic beads in glazed Sapphire are exceptionally hard wearing due to the high temperature used when firing the silver onto the ceramic base. These are beads with large holes, very individually shaped--not for perfectionists. Gems2Behold specializes in wholesale beads including Murano glass beads, Venetian beads, Swarovski crystals, glass beads and jewelry supplies for jewelry making.