Shop cubic zirconia (CZ) charms in a rainbow of sparkling birthstone colors! Cubic zirconia findings from Rings & Things include charms in 2 sizes (4mm and 8mm) channel set in sterling silver or 14kt Gold-Fill. The GF findings are available with crystal-clear diamond-like CZs, and the sterling silver charms and findings are available in jet black plus all 12 birthstone colors. See link at bottom of page for matching ear wires, connector links and loose CZ stones for creating your own custom findings. Sometimes called cubic zirconium, cubic zirconias are synthetic (manmade) gemstones. Like diamonds and natural zircons, cubic zirconias have a very high refractive index. High refractive index = high amounts of sparkle!