Sterling Silver Gemstone Earrings Versatile, timeless and classic with a twist. These double prong gemstone studs are crafted with sterling silver and will elevate any look day or night! Stud earrings feature 8mm round checkerboard cut Blue Topaz stones. High polished sterling silver double prong setting includes butterfly backs. Blue Topaz is December's birthstone. The natural properties and composition of mined gemstones define the unique beauty of each piece. The image may show slight differences to the actual stone in color and texture.