Coral and diamond set (Sold) Yellow gold 750. Set with colorless round brillant diamonds and red coral (Corallium rubrum, Linnaeus, 1758). The necklace can turn into a sautoir adding one or two bracelets. Atelier Brun (Pierre Brun), Paris. French assay marks. 1970s. Coral and diamond bracelets. Coral and diamond ring. Coral and diamond earrings. Coral and diamond necklace.