I AM NOT A JEWELER AND DO NOT KNOW HOW TO GRADE DIAMONDS.     PURCHASE ESTATE JEWELRY, THIS RING IS VERY PRETTY SIZE 8.  5 DIAMONDS ON TOP, WHICH I ESTIMATE TO BE TOTAL CARAT WT. .50, THE DIAMONDS LOOK GOOD. NICE SETTING, WHITE GOLD  SETTING FOR THE DIAMONDS YELLOW GOLD ON THE SHANK.  WT. 2.5 GRAMS. DIAMONDS LOOK EYE CLEAN,  NICE VINTAGE RING.