Gatsby Jewellery Ltd has dated this piece to the 1950s.
The ornate white gold shoulders are each set with a small eight cut diamond, leading to a slender 18k yellow gold shank. Currently UK size O or US size 7 (complimentary sizing available).

Accompanied by a report from Gemmological Certification Services (GCS) stating the sapphire shows no indication of heating.
Cut – Emerald cut sapphire and old European cut diamonds in the surround and eight-cut diamonds in the shoulders.

Clarity – The sapphire is loupe-clean. The diamonds are VS2 to SI1.
Carat – The sapphire is 3.01, with an approximate diamond weight of 1.30 carat.
Circa – 1950.
Size – O (UK) or 7 (US). Complimentary sizing is available, can go up or down.
Measurements – The sapphire is 10.31 x 7.35mm. The head of the ring is 15.3 x 12.4 and sits 7mm from the finger.
Weight – 6.35 grams
Metal – 18k yellow and white gold. Tested.
Gatsby Jewellery Ltd has dated this piece to the 1950s.
Gatsby jewellery are a husband and wife team who have years of knowledge and experience in dealing in fine antique jewellery.
You can view the stock and full dealer information on the Gatsby Jewellery Ltd Profile Page