Sapphires have been commonly heat-treated for over 100 years. The process clears the stone of silky inclusions, but also robs some of the sparkle. Unheated stones, when you can find them, are especially lively and have an almost magical aura. Case in point, this magnificent 8.24ct unheated stone - a pure, bright, medium blue with a remarkable shimmery, luminous quality. This singular gem has been set in an Edwardian inspired platinum and diamond mounting that caresses the sapphire with just the right amount of sugary diamond enhancement. A truly breathtaking ornament. Platinum with .25ctw in diamonds, current finger size 6.25. Includes a British lab report stating the sapphire is unheated.