The Crescent Moon Green Onyx Gold and Rhodium Stud Earrings are truly unique, showcasing a prominent green onyx gemstone surrounded by 15 zircon gemstones crafted from rhodium and 22K gold vermeil. It is interesting to note that zircon, a gem with a wide range of colors due to trace impurities, has been used since ancient times. Often considered a cheap alternative to diamonds, zircon can hold its own value as a precious stone.