Gatsby Jewellery Ltd has dated this piece to the 1920s.
The diamonds are set within in a platinum gold coronet cluster, leading to a slim 18k yellow gold shank.

Accompanied by an independent jewellery report from IGR (#30309634).
Cut – Mixed cut sapphire and old mine cut diamonds.
Colour – The diamonds are F to G.
Clarity – The diamonds are VS2 to SI1.
Carat – The sapphire is approximately 1.80 carat, with a total approximate diamond weight of 2.00.

Circa – 1925.
Size – R 1/2 (UK) or 8 7/8 (US). Complimentary sizing is available, can be sized up or down.
Measurements – The head of the ring is approximately 15.6 x 16.4mm and sits 6.2mm from the finger.
Metal – 18k yellow gold and platinum. Tested.
Video – To view a video of this ring in daylight, please copy / paste the following link into your browser: https://vimeo.com/566524662
Gatsby Jewellery Ltd has dated this piece to the 1920s.
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