90ct Natural BLUE PURPLE Certified Sapphire Platinum Ring... Great looking piece and well made. Solid and a nice heavy piece and almost 5 grams.Stone: Certified BI COLOR Natural NO HEAT Blue Purple Sapphire. Powered by SixBit's eCommerce Solution. The item "Antique 1940s $5000.90ct Natural BLUE PURPLE Certified Sapphire Platinum Ring" is in sale since Friday, October 22, 2021. This item is in the category "Jewelry & Watches\Fine Jewelry\Rings". The seller is "oldtreasures333" and is located in American Fork, Utah. This item can be shipped worldwide.