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

Accompanied by an independent jewellery report from SGL (#SGLJL65286G).
Cut – Old mine cut.
Colour – I.
Clarity – VS2.
Carat – 0.72.
Circa – 1910.
Size – Q 1/2 (UK) or 8.25 (US). Complimentary sizing is available, can be sized up or down.
Measurements – The centre diamond is approximately 5.9 x 5.1mm and sits 5.4mm from the finger.
Metal – 18k yellow gold and platinum. Stamped and tested.
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