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 Prynite and Titanium or Morganite and Yellow Gold: 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 December Birthstone Solitaire Jewelry design with meticulous attention to detail. Our precious metals are recycled or responsibly mined. Our wide selection of December Birthstone Solitaire Jewelry by talented designers means you can find jewelry that's exactly your style. You can also shop by style, choosing our Stud, Stacking, or Circle Collections. Gembuilder's fine quality December Birthstone Solitaire Jewelry is designed to be passed down for generations to come, crafted by hand in the United States.