An awesome vintage star sapphire ring. The grey-ish blue cabochon sapphire in the centre - certified as natural, unheated and from Ceylon (Sri Lanka) - displays a strong and clear asterism in daylight. The stone is rubover set in yellow gold and flanked by a pair of high white and internally clean old mine cut diamonds, also in rubover settings, leading to slim and tapering yellow gold shank. Accompanied by a report from Gemmological Certification Services (GCS) stating the sapphire shows no indication of heating, and is Sri Lankan (Ceylon) in origin.Cut:? Oval cabochon sapphire and old mine cut diamonds. Colour:? The diamonds are VS1 to VS2. Clarity:? The diamonds are G to H. Carat:? The sapphire is 6.35 carat. The diamonds are approximately 0.15 carat each. Circa:? 1920.Size:? N (UK) or 6.5 (US). Free sizing available.Measurements:? The sapphire is 10.37 x 8.65mm. From the outer edge of one diamond to the other is 16.9mm. The ring is 11.3mm at the widest point and sits 7.00mm from the finger.Weight:? 4.17 grams. Metal:? 18k yellow gold. Tested with a Niton DXL Precious Metal Analyzer.Item # 4121112S039