Gatsby Jewellery Ltd has dated this piece to the 1950s.

Accompanied by an independent jewellery report from IGR (#30309707).
Cut – Emerald cut in the centre with carré cuts either side.
Colour – I in the centre, F to G either side.
Clarity –SI1 in the centre, VS1 either side.

Carat – A known 1.00 carat in the centre with a further approximate 0.30 carat in the sides.
Circa – 1950.
Size – M 1/2 (UK) or 6.25 (US). Complimentary sizing is available, can go up or down.
Measurements – The diamond is 7.25 x 4.35mm. From the outer edge of one carré cut to the other is 11.6mm. Sits 5.1mm from the finger.
Metal – Platinum. Tested.
com/600349831
Gatsby Jewellery Ltd has dated this piece to the 1950s.
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