American, 20th century. Group of five rings including: stamped "585" yellow gold ring with eighteen small single cut diamonds, approx. .25ct, center oval sapphire doublet; stamped "585" yellow gold half hoop ring, five round rubies,eight small single cut diamonds; gold plated ring with five oval garnets; 10K yellow gold ring, diamond shaped top set with nine round synthetic blue stones; Together with 14K yellow gold ring with center oval blue stone surrounded by roundblue stones and small single cut diamonds (blue stones appear to be topaz). Total weight of four gold rings 18gr.