Gram Weight: 7.4 grams. The item "Antique 1940s 5.50ct Old Euro Natural Blue Zircon Diamond Platinum Ring" is in sale since Sunday, January 13, 2019. 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.