At Gembuilder, we believe that the Marquise Black Onyx Christmas Jewelry you wear should be precious because it's personal. Every beautiful Gembuilder design is made just for you, in your choice of gems and precious metals. Your child's birthstone is Dumortierite. Your favorite gem is Swarovski. Add your own meaning to every design, creating beautiful memories and brilliant reminders. Gembuilder uses only the highest quality materials to craft your Marquise Black Onyx Christmas Jewelry with meticulous attention to detail. Our precious metals are recycled or responsibly mined. Our wide selection of Marquise Black Onyx Christmas Jewelry by talented designers means you can find jewelry that's just your style. Black onyx captures the elegance of basic black. Clean your Marquise Black Onyx Christmas Jewelry with mild dish soap: use a soft brush where dust collects. Gembuilder's fine quality Marquise Black Onyx Christmas Jewelry is designed to be passed down for generations to come, crafted by hand in the United States.