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

Accompanied by a Natural Diamond Grading Report from HRD Antwerp (#210000182413).
Cut – Square emerald cut with eight-cuts in the shoulders.
Colour – G (G to H in the shoulders).
Clarity – VS1 (VS1 to VS2 in the shoulders).

Carat – 0.52 (with a further approximate 0.06 carat in the shoulders).
Circa – 1925.
Measurements – The diamond is 4.9 x 4.62mm. Sits 4.6mm from the finger.
Size – M (UK) or 6 (US). Complimentary sizing is available, can go up or down.
Metal – 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