{"product_id":"french-art-deco-gia-4-00-carat-sapphire-diamond-18k-yellow-gold-platinum-ring","title":"French Art Deco GIA 4.00 carat sapphire diamond 18k yellow gold platinum ring","description":"\u003cdiv\u003eAn emerald cut sapphire, weighing 4.00 carats and certified by GIA (#2245045094) as heat-treated and of Australian origin, anchors this French Art Deco ring, its step-cut facets showing off the sapphire's blue in broad, mirrored planes rather than the scattered sparkle of a brilliant cut. Thirty-eight Old European cut diamonds, weighing approximately 0.40 carat in G-H color and VS clarity, surround the center stone in a dense, glittering field, their antique faceting a signature of the period's diamond cutting. Crafted in 18k yellow gold and platinum and stamped with a French purity mark, confirming its origin and gold content under French hallmarking law, the ring weighs 4.94 grams. Circa 1930s, the combination of a GIA-documented, origin-specified sapphire this size with genuine French hallmarks and Old European cut diamonds makes this a rare, well-provenanced Art Deco piece for a serious collector or anyone seeking real French jewelry history.\u003c\/div\u003e","brand":"Jack Weir \u0026 Sons","offers":[{"title":"Default Title","offer_id":50518187901147,"sku":"38634","price":8500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0944\/1720\/files\/38634_4195849.jpg?v=1790375277","url":"https:\/\/jackweirandsons.com\/fr\/products\/french-art-deco-gia-4-00-carat-sapphire-diamond-18k-yellow-gold-platinum-ring","provider":"Jack Weir \u0026 Sons","version":"1.0","type":"link"}