Ring Cabochon sapphire and diamonds on Yellow Gold and Silver

Ring openwork band in yellow gold 18Kt and silver (hallmarks: owl and swan), set with an oval sapphire cabochon weighing approximately 2.80 Cts (probable origin: Siam), and diamonds rose-cut sapphires. Vintage work. Gross weight: 5.66 gDesign height: 1.00 cmSizeSize: 53 (diameter 16.75 / US 6.25). Condition: very slight micro-scratches and oxidation on the gold and silver parts. silver, wear on the setting, and natural inclusions in the stones, see photos.   Did you know that the sapphire has two possible origins? Firstly, it comes from the Greek sappheiros meaning blue. But it could also derive from the Hebrew sappir or "the most beautiful thing", although until the Middle Ages the term was used to refer to lapis lazuli. All our engagement rings.