A Retro Platinum, Diamond and Ruby Ring, containing one marquise cut diamond weighing 1.50 carats, 42 round brilliant cut diamonds weighing approximately 1.75 carats total and 14 rectangular step cut rubies weighing approximately 1.00 carat total.Stamp: 10085 PLAT (maker's mark) PT950.Accompanied by a Gemological Institute of America diamond grading certificate number 5289220, dated April 13, 1990, stating Color: D, Clarity: VVS2, Polish: Very good, Symmetry: Very good, Fluorescence: None. 10.50 dwts.