Cool antique hallmark wiht 5% iridium and 95% PLATINUM. This hallmark is very rare. Circa 1920s and almost 100 years old. The item "Antique 1920s $12000 1.50ct Old Euro Diamond Emerald Platinum Filigree Ring" is in sale since Sunday, March 6, 2016. This item is in the category "Jewelry & Watches\Fine Jewelry\Fine Rings\Diamond".The seller is "oldtreasures333" and is located in American Fork, Utah. This item can be shipped worldwide.