Gatsby Jewellery Ltd has dated this piece to the 1950s.

Accompanied by an independent jewellery report from IGR (#30309932).
Cut – Old mine cut.
Colour – H.
Clarity – SI3.
Carat – Approximately 0.65 carat.
Circa – 1955.
Size – M (UK) or 6 (US). Complimentary sizing is available, can go up or down. (The internal sizing adjuster will be removed when the ring is sized).
Measurements – The centre stone is 6.2 x 5.9mm. The ring is 10.30mm at the widest point and sits 5.4mm from the finger.
Metal – 18k gold. The diamond is set in platinum. 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