Gatsby Jewellery Ltd has dated this piece to the 1940s.
The stone is secured in a ten claw coronet collet, with diamond set platinum shoulders leading to a slim 18k yellow gold D-shaped shank.

Accompanied by an independent jewellery report by IGR (#30310107).
Cut – Old European cut (eight-cuts in the shoulders).
Colour – I (F to I in the shoulders).
Clarity – I1 (VS1 to VS2 in the shoulders).
Carat – Approximately 1.77 carat (with a further approximate 0.06 carat in the shoulders).

Circa – 1940.
Size – K 1/2 (UK) or 5 3/8 (US). Complimentary sizing is available, can be sized up or down.
Measurements – The diamond is approximately 7.9mm in diameter and sits 6.9mm from the finger.
Metal – 18k yellow and white gold. The shoulders are platinum. Tested.
Gatsby Jewellery Ltd has dated this piece to the 1940s.
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