These earrings are made of yellow canary zircon gemstones set in sterling silver. They have a stud backing. The Zircon gemstones is a real natural beautiful gemstone, which comes in many different colors. It is known for its brilliant's in color and sparkle. This gemstone comes from Australia, a country rich in colorful gems. The natural energy in this gemstone is said to be a great healer for insomnia, and help with stress relief. It helps enhance clear thinking. Zircon is one of the world oldest gemstones, and is known for it incredible brilliance and beautiful colors.