Georg Jensen Sterling Silver Pendant Necklace No. 15 with Amethyst. The necklace was designed by Georg Jensen in 1912. The necklace measures 25 inches with the chain measuring 20.5 inches and the pendant measuring 2.25 inches long by 1.875 inches wide. The necklace bears impressed marks for Georg Jensen, GI, 830 S, 15. This necklace is in excellent condition.