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 1920s.
The head of the ring steps down to nicely shaped shoulders featuring four (two each side) eight-cut diamonds to a slim, D-shaped shank. A stunning ring with heaps of Deco charm.

Accompanied by an independent jewellery report from IGR (#30307795).
Cut – Old European cut in the centre, with eight cut diamonds in the shoulders.
Colour – The centre is I. The smaller diamonds are G to H.

Clarity – The centre is SI2. The smaller diamonds are VS1 to VS2; all are clean to the naked eye.
Carat – The centre approximately 0.60 carat, with a further approximate 0.06 carat in the surround.
Circa – 1925.

Measurements – The head of the ring is 9.2 x 9.8mm. Sits 6.2mm from the finger.
Size – O (UK) or 7 (US). Complimentary sizing is available, can go up or down.
Metal – Platinum. French hallmarks.
https://www.gatsbyjewellery.co.uk/product/art-deco-0-60-carat-old-cut-diamond-solitaire-ring-french-circa-1925/
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