A glorious true blue that evokes sea views, summer skies and other lovely things. This is a rare color to see in jewelry, especially in an untreated stone. Natural zircon is not the same thing as cubic zirconia or "CZ" crystals. Zircon is a real natural gemstone that offers a high refraction of light. These vintage earrings have 1.30 total carat weight. The four-prong 14K yellow gold studs come with classic butterfly backs.