Gatsby Jewellery Ltd has dated this piece to the 1920s.
The twelve old cut diamonds are rubover set in milgrained platinum and sit atop a rose gold gallery with sweeping “U” detailing, to a slim rose gold shank.

Cut – Round cut rubies and old cut diamonds.
Colour – The diamonds are H to J.
Clarity – The diamonds are SI1 to SI2; all are clean to the naked eye.
Carat – The central ruby is approximately 0.20 carat, with a total approximate ruby weight of 0.40 carat. The total approximate diamond weight is 0.50 carat.

Circa – 1920.
Size – L 1/2 (UK) or 5 7/8 (US). Complimentary sizing is available, can go up or down.
Measurements – The head of the ring is 13.9 x 8.5mm. Sits 5mm from the finger.
Metal – 18k rose gold and platinum. Tested.
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