Sapphire and diamond cluster ring, Tiffany & Co., circa 1930. This classic sapphire and diamond cluster is signed by Tiffany & Co., the quintessential American jeweller. At its centre is a cushion-shaped sapphire of a deep, well-saturated blue, surrounded by early 20^th century circular-cut diamonds in a handmade platinum mount, with an intricately pierced gallery at the sides - a hallmark of Tiffany’s high-quality and extremely detailed approach to jewellery design. With a low profile against the hand and split shoulders, this ring is not only extremely attractive, but also very comfortable and light – a perfect mix of beauty and wearability.