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 1900s.

Clear hallmarks from the Birmingham (UK) assay office, dated 1888.
Cut - Old mine / miner cut.
Colour - G.
Clarity - VS2.
Carat - Approximately 0.65 carat
Circa - 1900.
Condition - Evidence of a resize, but in fine condition considering the ring's age.
Size - Currently P (UK) or 7 1/2 (US). Complementary sizing is available, can go up or down.
Measurements - The diamond is 5.5mm in diameter.
Metal - 18k gold. Fully hallmarked.
Gatsby Jewellery Ltd has dated this piece to the 1900s.
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