Gatsby Jewellery Ltd has dated this piece to the 1920s.
The stone is secured in a four claw collet with geometric detailing in the gallery, leading to a slim 18k yellow gold shank.

Accompanied by an independent jewellery report from IGR.
Cut:? Oval shaped old mine cut.
Colour:? H.
Clarity:? VS2.
Carat:? 1.20.
Circa:? 1920.
Size:? L (UK) or 5 1/2 (US). Free sizing available.
Measurements:? The diamond is approximately 7.0 x 5.8mm and sit 6.5mm from the finger.
Weight:? 2.93 grams.
Metal:? 18k yellow gold. Tested with a Niton DXL Precious Metal Analyzer.
Item # 410313S103
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