A ruby and diamond ring, claw-set with an oval ruby weighing approximately 1.00 carat, between

A ruby and diamond ring, claw-set with an oval ruby weighing approximately 1.00 carat, between shoulders set with brilliant-cut diamonds totaling approximately 1.20 carats, mounted in gold and platinum, size R, stamped PLAT 18CT

A verbal report from GCS states that the ruby measuring approximately 8.7 x 6.4 x 2.5mm is of Thai origin, with no indications of heating