It was listed by Gatsby Jewellery Ltd. Sold pieces stay on Sellingantiques as a record of what has passed through, and the next one is rarely far away.
Gatsby Jewellery Ltd has dated this piece to the 1940s.

Carat – 12.20.
Cut – Step cut aquamarine and eight-cut diamonds.
Circa – 1945.
Size – Q (UK) or 8 (US). Complementary sizing is available, can go up or down.
Measurements – The aquamarine is 14.2mm by 12.9mm and sits 10mm from the finger.
Metal – 18k white gold. 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