http://www.etsy.com/listing/64873689/platinum-vintage-ring-zircon-blue-1950s This alluring European ring, Circa 1950s, is made of platinum. The center blue/green stone is a semi precious gem called zircon with a weight of 3.39 Carats. The jewel is hallmarked "950" indicating a platinum alloy of 95%. The ring weighs 6.90 Grams and the finger US size is 5¼. It is our pleasure to resize the ring for you at our expense. From our expertise, this ring is in excellent condition and fine quality.