Gatsby Jewellery Ltd has dated this piece to the 1920s.
The stone is secured in an eight-claw yellow gold coronet setting, accented by platinum shoulders set with four (two either side) eight cut diamonds, to D-shaped yellow gold shank.

Accompanied by an emerald report from The Gem & Pearl Laboratory stating the emerald shows no evidence of clarity enhancement, and is Colombian in origin.
Cut – Rectangular cushion cut emerald with old cut diamonds in the shoulders.

Clarity – The emerald is loupe clean. The diamonds are VS1 to VS2.
Carat –The emerald is approximately 0.80 carat, with a total approximate diamond weight of 0.20 carat.
Circa – 1920.
Measurements – The emerald is 6.1 x 5mm. Sits 4.8mm from the finger.
Size – J (UK) or 4 5/8 (US). Complimentary sizing is available, can go up or down.
Metal – 18k yellow gold and platinum. Tested.
Gatsby Jewellery Ltd has dated this piece to the 1920s.
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