Gatsby Jewellery Ltd has dated this piece to the 1930s.
The stone is secured in a six claw collet with scroll detailing in the gallery and is flanked by a pair of bright, electric blue oval cut sapphires. Currently UK size O, US size 7 (complimentary sizing available).

Accompanied by an independent jewellery report from IGR (#30310642).
Cut – Old mine cut diamond and oval cut sapphires.
Colour – The diamond is M.
Clarity – The diamond is VS2. The sapphires are eye-clean.

Carat – The diamond is a known 0.64 carat, with a total approximate sapphire weight of 2.79 carat.
Circa – 1935.
Measurements – From the outer edge of one sapphire to the other is 19mm. The ring is 6.4mm at the widest point and sits 5.9mm from the finger.
Size – O (UK) or 7 (US). Complimentary sizing is available, can go up or down.
Weight – 4.95 grams.
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