This Art Deco necklace features a Santa Maria blue rectangular step-cut aquamarine, weighing approximately 20 carats. The aquamarine is set in a platinum bezel with hand engraving and milligrain details. A geometrically designed platinum work connects to the pendant top, which is adorned with an old European-cut diamond. The pendant extends from a 15-inch platinum link chain, while the pendant measures 2 inches in length and 0.6 inches in width.