Gatsby Jewellery Ltd has dated this piece to the 1950s.
The stone sits atop a heavyweight 18k yellow gold ring with a striking rope twist design.

Accompanied by an independent jewellery report by IGR (#30309589).
Cut – Round cabochon
Carat – Approximately 4.83.
Circa – 1955.
Size – K 1/2 (UK) or 5 3/8 (US). Complimentary sizing is available, can be sized up or down. There is some limit to how much this can be sized so please contact prior to ordering if you would need this altered.
Measurements – The ring is 14.1mm at the widest point and sits 10mm from the finger.
Weight – 19.65 grams.
Metal – Stamped 750 indicting 18k gold, and tests as such.
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