14k Yellow Gold, White Gold or Sterling Silver Simulated Blue Turquoise Ball Stud Earrings Unsure what size earrings to buy? 5mm is the perfect size that will look great on most people. These earrings are made of solid 14k gold, featuring high quality simulated turquoise. Our simulated turquoise stones have a beautiful, bright and realistic color so they will easily convince others it's the real thing. Made in-house at Beauniq Fine Jewelry in NYC.