Gatsby Jewellery Ltd has dated this piece to the 1910s.

Hallmarks from the Birmingham Assay, 1918.
Cut – Round cut sapphire and old mine cut diamonds.
Colour – The diamonds are G and I.
Clarity – SI2.
Carat – The sapphire is approximately 0.07 carat, with a total approximate diamond weight of 0.08 carat.

Weight – 9.58 grams
Dated – 1918.
Size – P (UK) or 7.5 (US). Complimentary sizing is available, can be sized up or down.
Measurements – The ring is 13.55mm at the widest point and sits 4.8mm from the finger.
Metal – 18k gold.Fully hallmarked.
Gatsby Jewellery Ltd has dated this piece to the 1910s.
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