LOT 249 An 18k gold ruby and diamond cluster ring
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18 kt Weißgold. The round bezel set with an oval shaped natural Thai ruby (ca. 1.25 ct, ca. 7.04 x 5.60 x 3.65 mm) surrounded by 16 brilliant-cut diamonds (in total ca. 1.44 ct, G/H, vs-si). Hallmarks: Fineness 750, maker's mark "CD". Bezel diameter 1.4 cm. Ring size 55. Weight 4.17 g. Carl Bucherer, 1960s. Certificate Gemstone Report of the DSEF, Idar Oberstein, no. 031155 from 02.12.2020 confirms the central stone to be a natural ruby with no indications of heat treatment (NTE). Origin: Thailand. Tested insofar as mounting permits.
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