Gatsby Jewellery Ltd has dated this piece to the 1940s.
The stone is secured in an eight-claw white gold collet. The centre nestles between perfectly matched (but slightly whiter than the centre stone) old cut diamonds in six claw white gold setting, leading to a slender 18k yellow gold shank. So, so impressive.

Accompanied by a diamond grading report from HRD Antwerp (#210000182318).
Cut – Old European cuts.
Colour – K in the centre, I in the sides.
Clarity – SI2 in the centre, and VS1 to VS2 in the sides.
Carat – 1.23 carat in the centre. Each of the side stones is approximately 0.45 carat.

Circa – 1940.
Size – L (UK) or 5.5 (US). Complimentary sizing is available, can be sized up or down.
Measurements – The centre diamond is 7.28 x 7.30mm. From the edge of one outer diamond to the other is 17mm. Sits 5.6mm from the finger.
Metal – 18k yellow and white gold. Tested.
Gatsby Jewellery Ltd has dated this piece to the 1940s.
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