Vintageruby and diamondcluster ring. Set to centre with an oval old cutnatural unenhanced Siam ruby in an open backclaw setting with an approximate weight of 2.00 carats, encircled by two stepped rows of round brilliant cutdiamonds in open back claw settings with an approximate combined weight of 0.70 carats, and alternated by a single row of inward tapered baguette cut diamonds in open back claw settings with a combined weight of 1.00 carat. The total approximate diamond weight is 1.70 carats, to a ballerina cluster design featuring curving claws, a structured linear gallery and open backholing, leading to inwardly tapering shoulders and flowing smoothly down to a solid flat shank. Testedwhite gold, circa 1970, accompanied by Gem & Pearl Laboratory report #07865.