An Art Nouveau style marquise diamond and red gemstone ring, where the main attraction is the bezel set in 18K white gold, old cut marquise diamond measuring approximately 7.5mm x 3.5mm or 0.33 carats with three additional smaller single cut diamonds for an additional 0.12carats for a total diamond weight of approximately 0.45 carats! The marquise diamond does show a hint of color as many vintage diamonds of the era did, which some may call a cinnamon champagne diamond, estimated in the L-M…