Gatsby Jewellery Ltd has dated this piece to the 1910s.
The centre stone sits within, and is secured by, tri-split shoulders, set with a total of 26 old cut and eight-cut diamonds which leads to a slender, knife-edge platinum shank. Utterly, utterly wonderful.

Accompanied by an independent jewellery report from IGR (#30310571).
Cut – Old mine cut in the centre, with old cut and eight-cut diamonds in the shoulders.
Colour – The centre is G, the diamonds in the shoulders are E to F.

Clarity – The centre is VVS2. The diamonds in the shoulders VS2 to SI1.
Carat – The centre is approximately 1.32 carat, with a further approximate 0.35 carat in the shoulders.
Circa – 1910.
Size – N (UK) or 6.5 (US). Complimentary sizing is available, can be sized up or down.
Measurements – The centre is approximately 6.9 x 6.6mm and sits 5.1mm from the finger.
Weight – 2.87 grams.
Provenance – French.
Metal – Platinum. French hallmarks.
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