At Gembuilder, we believe that the jewelry you wear should be one of a kind, like you. That's why we make each piece to order, one at a time, just the way you want it. Choose Teal Crystal and Ceramic or Dark Blue Crystal and Silk: it's your choice. Mix and match gems and precious metals for a look that's exactly you. Gembuilder uses only the highest quality materials to craft your Marquise December Birthstone Tanzanite Jewelry design with meticulous attention to detail. Our precious metals are recycled or responsibly mined. Tanzanite is an exotic rare treasure.Our wide selection of Marquise December Birthstone Tanzanite Jewelry by talented designers means you can find jewelry that's exactly your style. You can also shop by style, choosing our Minimalist, Chains, or Y-Neck/Lariat Collections. Gembuilder's fine quality Marquise December Birthstone Tanzanite Jewelry is designed to be passed down for generations to come, crafted by hand in the United States.