Gatsby Jewellery Ltd has dated this piece to the 1930s.
The stones is secured in a four claw platinum collet with hoop detailing in the gallery. On a plain platinum shank which tapers at the shoulders.

Accompanied by an independent jewellery report from IGR (#30310514).
Cut – Old mine cut.
Colour – H.
Clarity – SI1.
Carat – 0.66.
Circa – 1935.
Size – L (UK) or 5.5 (US). Complimentary sizing is available, can go up or down.
Measurements – The centre is approximately 5.9 x 5.4mm and sits 6.6mm from the finger.
Metal – Platinum.
Gatsby Jewellery Ltd has dated this piece to the 1930s.
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