Oscar Heyman Brothers diamond and ruby ballerina ring, circa 1960. Set to centre with a single round old cut diamond in an open back claw setting with a weight of 0.75 carats, encircled by a row of eighteen tapered baguette cut diamonds in open back rubover settings with a combined weight of 1.14 carat, entwined with a row of eighteen tapered baguette cut natural unenhanced rubies in open back rubover settings with an approximate combined weight of 1.49 carats. The total approximate diamond weight is 1.89 carats, to an elegant stepped ballerina cluster with polished borders, a structured openwork gallery and intricately pierced open backholing, leading to split shoulders and flowing trough to a solid ridged shank. Marked 18 carat yellow gold and platinum, maker's mark for Oscar Heyman Brothers, inscribed '26388', American, circa 1960, accompanied by Oscar Heyman Brothers authenticity certificate.
