Montana Sapphire Blue With Swirls. Glass Cabochon. 18x13mm Oval. Quantity: 1 Cabochon. Translucent Montana Sapphire colored glass with opaque white swirls. No two pieces alike! Flat back oval cabochon beads, suitable for gluing into bezel settings, onto flat back bails, even directly on to fabric. Cabochon beads have a flat back and are not drilled. These are a classic oval shape with a smooth surface and they are a standard size that fits many styles of setting, both vintage and modern. Please check dimensions to make sure they will fit your project. There are many suitable adhesives for securing your cabochon - one that we recommend is E6000. Each glass cabochon measures 13mm Wide, 18mm Long, 6mm Height. Quantity: You will receive 1 Cabochon.