A very unusual free-form design by Mauboussin, typical of the new styles of the time. It consists of round cut diamonds bordered by diamond baguettes, with a rich blue cabochon sapphire in the middle. This is a very unusual and “modern” design, and is illustrated on p.201 of Marguerite de Cerval’s book on Mauboussin. This ring is certain to draw the right kind of attention. Ring size 6.25, can be re-sized. France, ca. 1965.