Art Deco 1.3ct Diamond Eternity Ring

Art Deco 1.3ct Diamond Eternity Ring with Ajour work on the inside of the band

À jour is a term in gem setting, derived from the French word "jour" meaning day. It refers to open-worked backgrounds in jewelry, created by sawing or piercing, allowing light to enhance the gem's scintillation and color. Popularized around 1800, fine à jour work is achieved using a graver to create well-formed openings on the reverse side, a characteristic seen in Art Deco jewelry.