Large sapphire and diamond ring, circa 1925. Sri Lanka has been a source of gemstones for millennia, which has led to its nickname 'Ratna Dweepa' - the 'Island of Gems'. Among the many stones it produces, none is more famous than its blue sapphires, which are adored for their soft blue tones known as 'cornflower' blue. This ring is set with an unheated Sri Lankan sapphire in a beautiful mid blue with a lively oval cut showing off its excellent clarity and colour. The design is enhanced by a geometric band channel-set with step-cut diamonds, lending it a touch of Art Deco-style geometry. With a design that sits well alongside a plain wedding band, it's a classic yet stylish choice for an engagement ring.