Gatsby Jewellery Ltd has dated this piece to the 1930s.

Accompanied by an independent jewellery report from IGR (#30310073).
Cut – Old mine cut diamond in the centre with eight-cut diamonds in the shoulders.
Colour – G (F to G in the shoulders).
Clarity – VS2 (VS1 to VS2 in the shoulders).

Carat – 0.64 carat in the centre (with a further approximate 0.10 carat in the shoulders).
Circa – 1930.
Measurements – The diamond is 5.4 x 5.0mm and sits 5.5mm from the finger.
Size – M 1/2 (UK) or 6.25 (US). Complimentary sizing is available, can go up or down.
Metal – 18k yellow gold and platinum. Tested.
Gatsby Jewellery Ltd has dated this piece to the 1930s.
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