Van Cleef and Arpels, an emerald and diamond demi-parure, comprising an abstract yellow ring set

Van Cleef and Arpels, an emerald and diamond demi-parure, comprising an abstract yellow ring set with graduated circular-cut emeralds and diamonds, signed Van Cleef & Arpels 6500 C.S with French control marks and maker's lozenge, size L, with a pair of similar emerald and diamond earrings in textured yellow gold, signed, with maker's lozenge and French control marks and London import marks for 1960, post and clip fittings, length 3.2cm, gross weight 41g