This beautiful piece is marked 950. This ring measures approximately 9.3mm (0.36 inch) wide on top and it weighs approximately 6.9 grams plus this ring should fit a finger size 5.75.The item "Estate 4.50ct Royal Blue Sapphire & 0.40ct Diamond Platinum Ring Size 5.75" is in sale since Thursday, January 26, 2017. This item is in the category "Jewelry & Watches\Vintage & Antique Jewelry\Fine\Retro, Vintage 1930s-1980s\Rings". The seller is "47ddc" and is located in New York, New York. This item can be shipped worldwide.