A sapphire and diamond pendant necklace

A sapphire and diamond pendant necklace
The oval-cut sapphire weighing 12.57 carats, within an openwork surround accented by old brilliant-cut diamonds, the polished surmount similarly accented, to a snake-link chain with old brilliant-cut diamond spacers, mounted in 18 carat yellow gold, diamonds approx. 0.40ct total, UK maker's mark, European convention mark, lengths: pendant 2.2cm, chain 40.5cm

Accompanied by a report from GCS stating that the sapphire is natural, of Sri Lankan origin, with no indications of heating. Report number 78135-43, dated 21st December 2017.