Large And Unusual Art Deco Style Lemon Quartz & Peridot 9k Gold Ring Size O. The gemstones have been set into a beautifully designed and substantial Art Deco setting which really shows off the gemstones at their best. It is fully hallmarked for 9ct gold with "375", anchor for Birmingham, "QVC" and date letter "d". It weighs 5.3 grams, the top of the ring measures approx 2.0 cm by 1.3 cm. It is a size O. Excellent condition.