An Art Deco diamond ring of stepped square design set with a central old European cut diamond in platinum. René Boivin, France. Accompanied by a letter of authenticity from Françoise Cailles stating the ring is from a design by Juliette Moutard. Atw European cut diamond 0.62 ct., accented with approximately 1.06 ct. diamonds.

René Boivin founded his storied jewelry house during the 1890s in Paris. Upon his death in 1917 his wife Jeanne, the sister of the famous couturier Paul Poiret, took over the running of the company. This was an unusual path for a woman at the time, and she was the first woman to head a major jewelry house in Paris. Jeanne worked closely with her daughter Germaine and the jewelry designer Juliette Moutard. Their geometric and streamlined Art Deco jewels and Mid-Century creations inspired by botanicals and animals became well known in France and beyond. Jeanne is also credited with discovering the legendary jewelry designer Suzanne Belperron who, after designing for Boivin from 1919 to 1932, founded her own company. Both the houses of Boivin and Belperron are widely regarded as two of the most important jewelers of the 20th century.