A delightfully unique vintage cluster ring. The sapphire in the centre - certified as natural, unheated, and originating from Ceylon (Sri Lanka), displays a soft but vibrant cornflower blue. The stone is rubover set in 18k white gold and surround by ten round brilliant cut diamonds. The cluster sits nice and low to the finger, with distinctive bow detailing in the shoulders, leading to a triple-wire 18k white gold shank. Accompanied by a sapphire report from Gemmological Certification Services (GCS) stating the sapphire shows no indication of heating, and is Sri Lankan (Ceylon) in origin.Cut: Oval cut sapphire and round brilliant cut diamonds. Colour: The diamonds range from G to J.Clarity: The sapphire is eye-clean. The diamonds range from VS2 to SI2; all are eye-clean.Carat: The sapphire is approximately 2.50 carat. The total approximate diamond weight is 1.00 carat.Circa: 1965.Size: P 1/2 (UK) or 7 3/4 (US). Free sizing available.Measurements: The sapphire is 9.2 x 7.5mm. The head of the ring is 17.15 x 14.5mm and sits 4.8mm from the finger. Weight: 5.71 grams.Metal: 18k white gold. Tested with a Niton DXL Precious Metal Analyzer.Video: To view videos of this ring recorded in daylight, please copy / paste the following link into your browser: https://gatsbyjewellery.co.uk/products/mid-century-2-50-carat-unheated-ceylon-sapphire-diamond-cluster-ring-circa-1965