Gatsby Jewellery Ltd has dated this piece to the 1960s.
The stone is secured in an eight-claw white gold coronet collet, leading to a slim and tapering D-shaped yellow gold shank.

Accompanied by an independent jewellery report from IGR (#30309529).
Cut – Round brilliant cut.
Colour – L.
Clarity – VS1.
Carat – 1.25.
Size – M 1/2 (UK) or 6.25 (US). Complimentary sizing is available, can be sized up or down.
Measurements – The diamond is approximately 6.9mm in diameter. Sits 5.3mm from the finger.
Metal – 18k yellow and white gold.
Gatsby Jewellery Ltd has dated this piece to the 1960s.
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