A GROUP OF FIVE RING, Including a single stone diamond ring set with an old brilliant-cut diamond, weighing approximately 0.25 carats, ring size L¼ ; a diamond ring of marquise form, set with old brilliant-cut diamonds, diamonds approx. 0.12 carat total, ring size M ; an opal ring set with a circular opal cabochon, ring size N¼ ; a 9 carat gold signet ring, set with an oval onyx plaque, UK hallmarks, ring size M ; an opal ring set with an oval opal cabochon, gypsy-set within a star motif detail, ring size M½ (5)