Three gem-set and diamond rings

Three gem-set and diamond rings, comprising: a ring of bombé design, pavé-set with brilliant-cut diamonds and floral arrangements of circular-cut rubies, mounted in gold, size M, stamped 18K 750; a ring pavé-set with brilliant-cut diamonds, spaced by bands of calibré-cut emeralds, rubies and diamonds, mounted in gold, size O, stamped 750, numbered 25021; and an articulated gold ring set with step-cut sapphires and brilliant-cut diamonds, size O