Amethyst and coral brooch and earrings, Van Cleef & Arpels (Sold) Yellow gold 750. Amethyst et red coral (Corallium rubrum, Linnaeus, 1758). Signed Van Cleef & Arpels and numbered 12399 (brooch) and 125663 (earrings). French assay marks. 1970s. Amethyst and coral brooch and earrings, Van Cleef & Arpels