Gatsby Jewellery Ltd has dated this piece to the 1920s.

Contemporary hallmarks.
Cut – Old European cut.
Colour – G.
Clarity – VS2.
Carat – 0.36.
Circa – The diamond is circa 1920, the mount is new.
Size – M (UK) or 6 (US). Complimentary sizing is available, can be sized up or down.
Measurements – The diamond is 4.4mm in diameter and sits 4.9mm from the finger.
Metal – 18k yellow gold. Hallmarked.
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