HOLLOWWARE / TEA SETS. FINE ESTATE & VINTAGE JEWELRY. SILVER FLATWARE & SILVERWARE. New Georg Jensen Hollowware. New Georg Jensen Jewelry. Michael Aram – New. Add to Favorite Sellers. Sign up to Newsletter. Vintage 10k Gold Men’s 1.76ct Genuine Natural Blue Onyx Chalcedony Ring (#J6543). All of our jewelry is guaranteed authentic by our Graduate Gemologist of the Gemological Institute of America (GIA). Vintage 10k yellow gold men’s 1.76 carat blue chalcedony (onyx) ring. The rectangular chalcedony stone measures about 9.5mm x 8mm and has a greyish-blue color. The ring fits a size 10.25 finger, weighs 3.18 dwt. And dates from the 1940-50s. Family Owned & Operated. Customer service is the foundation of all that we do. We sincerely appreciate the opportunity to earn your business. A variety of services is just a moment away. INTERNATIONAL ORDERS: It is our pleasure to work daily with clients around the globe. We guarantee that the goods are as described in the above listing. We pride ourselves on our customer service. The United States Supreme Court’s recent ruling in South Dakota vs. How do I return my product? This listing is currently undergoing maintenance, we apologise for any inconvenience caused.