Gatsby Jewellery Ltd has dated this piece to the 1930s.

Accompanied by an independent jewellery report from IGR (#30309509).
Cut – Square step cut emerald and rose cut diamonds.
Colour – The diamonds are F to G.
Clarity – The are visible inclusions in the emerald, which is normal and expected of this gemstone . The diamonds are SI1 to SI2 (clean to the naked eye).

Carat – The emerald is a known 2.97 carat with a total approximate diamond weight of 0.56 carat.
Circa – 1935.
Size – L (UK) or 5 7/8 (US). Complimentary sizing is available, can be sized up or down.
Measurements – The emerald is approximately 8.25 x 8.5mm. The head of the ring is 13.1 x 13.2mm and sits 7mm from the finger.
Metal – 18k white gold and platinum. French hallmarks.
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