Gorgeous Green Zircon Earrings! Zircons should not be confused with cubic zirconia. Zircon is a fabulous high dispersion natural gemstone that shows great sparkle. These stud earrings are crafted in 14K yellow gold featuring a 3 prong setting and butterfly backs. Gemstones measure 6.4mm in diameter. Weight of the gemstones are a total of 2.28 carat.