A COLLECTION OF FOUR GEM-SET RINGS IN PLATINUM OR GOLD

A COLLECTION OF FOUR GEM-SET RINGS IN PLATINUM OR GOLD, comprising: an aquamarine and diamond ring, set with an cushion-shaped aquamarine between two round brilliant-cut diamonds, in a raised openwork platinum setting, stamped Pt900, size L, a ruby and diamond cluster ring, set with a circular-cut ruby within a surround of circular-cut diamonds, in white and yellow gold, stamped 14-18k, inscribed 'Marvel', size L, a diamond three stone ring, set with three round brilliant-cut diamonds, in platinum, stamped PM and 0.70cts, size L 3/4, and a star sapphire and diamond ring, set with a sapphire cabachon flanked by six round brilliant-cut diamonds, in platinum, stamped Pt900, size L 1/2