Gram Weight: 5.5 Grams. Powered by SixBit's eCommerce Solution. The item "Antique 1940s $4000 5ct Old Mine Cut Natural Blue Zircon Diamond Platinum Ring" is in sale since Monday, January 14, 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.