Gatsby Jewellery Ltd has dated this piece to the 1910s.
The stone is secured by four claws set at compass points, with triangular detailing in the gallery. Slender, diamond-set shoulders lead to a slim 18k gold shank with notch detailing just under the diamonds.

Accompanied by a diamond report from IGI.
Cut: Old European cut in the centre, with eight-cuts in the shoulders.
Colour: The centre is H. The diamonds in the shoulders are F to G.
Clarity: The centre is SI1. The diamonds in the shoulders are VS1.

Carat: 1.21 in the centre. With a further approximate 0.06 carat in the shoulders.
Circa: 1910.
Size: L (UK) or 5 1/2 (US). Free sizing available.
Measurements: The diamond is 6.93 x 6.56mm and sits 5.9mm from the finger.

Weight: 1.74 grams.
Metal: 18k gold. Tested with a Niton DXL Precious Metal Analyzer.
Video: To view videos of this ring recorded in daylight please either contact us, or copy / paste the following link into your browser: https://gatsbyjewellery.co.uk/products/antique-1-21-carat-old-cut-diamond-engagement-ring-circa-1910
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