It was listed by Gatsby Jewellery Ltd. Sold pieces stay on Sellingantiques as a record of what has passed through, and the next one is rarely far away.
Gatsby Jewellery Ltd has dated this piece to the 1850s.

Accompanied by a GIA certificate, report no. 6193465976.
Cut – Old pear cut (with eight-cuts in the shoulders).
Colour – D (with E to F in the shoulders).
Clarity – SI2 (with VS1 to VS2 in the shoulders).

Carat – 4.05 (with an additional approximate 0.14 carat in the shoulders).
Circa – The diamond is circa 1850, in a new setting.
Measurements – The diamond is 13.16 x 9.98mm. Sits 6.7mm from the finger.
Size – L 1/2 (UK) or 5 7/8 (US). Complimentary sizing is available, can go up or down.
Metal – Platinum. Tested.
Gatsby Jewellery Ltd has dated this piece to the 1850s.
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