Gatsby Jewellery Ltd has dated this piece to the 1940s.
The stone is secured in an eight-claw coronet collet leading to a finely pierced and milgrained shoulders featuring a further six (three each side) old mine cut diamonds, leading to a slim D-shaped shank.

Accompanied by a diamond grading report from HRD Antwerp (#210000182332).
Cut – Old European cut in the centre with old mine cuts in the shoulders.
Colour – G (the diamonds in the shoulders are H to I).

Clarity – VVS1 (VS1 to VS2 in the shoulders).
Carat – 0.80 in the centre (with a further approximate 0.15 carat in the shoulders).
Circa – 1940.
Size – L (UK) or 5.5 (US). Complimentary sizing is available, can be sized up or down.

Measurements – The diamond is 6.16 x 6.27mm and sits 6.3mm from the finger.
Metal – 18k white gold. Tested.
Video – To view a video of this ring recorded in daylight, please copy / paste the following link into your browser: https://vimeo.com/637125007
Gatsby Jewellery Ltd has dated this piece to the 1940s.
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