Solid Platinum and a havy 6 grams. Stone: Natural Blue Sapphire & Diamond. The item "Antique 1940s 3ct Old Cut Natural Blue Sapphire Diamond Platinum Wedding Ring" is in sale since Sunday, March 12, 2017.This item is in the category "Jewelry & Watches\Fine Jewelry\Fine Rings\Gemstone". The seller is "oldtreasures333" and is located in American Fork, Utah. This item can be shipped worldwide.