Sterling Silver cuff links by Studio GL. Cuff Links measure .75" in length, and have inlay of Wooly Mammoth Ivory. Wooly Mammoth tooth is very rare and is petrified. The Wooly Mammoth went extinct during the Pleistocene era. A rainbow of colors are found when the ivory is cut for inlay jewelry. You will see excellent examples of Wooly Mammoth ivory inlay by Studio GL. Hallmarked.