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 1950s.

Cut - Oval cut emerald with brilliant cut diamonds.
Colour - Emerald is minty and electric, diamonds are G.
Clarity - Emerald is remarkably clean (for an emerald, which are always included). Diamonds are VS.

Carat - Emerald is approximately 0.60 carats. There are 32 diamonds; those in the split shank are about 0.01 each, in the "flower" next to the emerald they are about 0.02 each, so a total diamond weight of approximately 0.42.

Circa - 1950.
Condition - Appears to have hardly been worn. Perfect!
Size - Currently M (UK) or 6 (US). Complementary sizing is available, can go up or down in size.
Measurements - The yellow gold band is 1.5mm at the bottom, slightly tapering up to 2.5mm by the diamond shoulders. The ring sits 4.5mm from the finger and is 11.5mm wide at the top.
Metal - 18ct gold, with full Assay marks.
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