A sapphire and diamond cluster ring, Monture Cartier

A sapphire and diamond cluster ring, Monture Cartier, set with three round brilliant-cut diamonds weighing approximately 0.57, 1.01 and 0.57cts, within a surround of calibre-cut sapphires and round brilliant-cut diamonds on a wirework band in platinum, signed Monture Cartier, French control mark, size M