Art Deco Style Green Amethyst & White Topaz 9K Gold Ring Size N 1/2. The setting has a beautiful Art Deco design to show off the quality of the gorgeous and fantastic green amethyst gemstone, it has 8 white topaz set into the shoulders. It was fully hallmarked for 9ct gold with "375", anchor for Birmingham, "GTV" and date mark "f" . It weighs a substantial 3.8 grams. Size N 1/2. Excellent condition.