Gatsby Jewellery Ltd has dated this piece to the 1930s.
The stone is set in a six claw platinum collet and sits on a slim rose gold shank set with ten (five each side) eight-cut diamonds set in the milgrained shoulders. A ring of true class.

Accompanied by a diamond report from IGI (#371971686).
Cut – Old European cut (with eight-cuts in the shoulders).
Colour – H (G to H in the shoulders).
Clarity – SI2 (VS1 to VS2 in the shoulders).
Carat – 1.00 (with a further approximate 0.8 carat in the shoulders).

Circa – 1935.
Size – N (UK) or 6.5 (US). Complimentary sizing is available, can be sized up or down.
Measurements – The diamond is 6.37 x 6.05mm. Sits 6.6mm from the finger.
Metal – 18k rose gold and platinum. Tested.
Video – To view a video of this ring recorded in daylight, please copy / paste the following link into your browser: https://vimeo.com/738569075
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