4.09ct NO HEAT BLUE Sapphire from BURMA. VERY RARE and circa 1940s on the ring... One of the best in the gemstone business. Stone: Natural BURMA NO HEAT Sapphire and Diamonds.Powered by SixBit's eCommerce Solution. The item "Antique $25K 4.59ct Certified NO HEAT BURMA Blue Sapphire Diamond Platinum Ring" is in sale since Monday, September 21, 2020. 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.