Gatsby Jewellery Ltd has dated this piece to the 1910s.
The stone is mounted in a closed-back rubover setting in yellow gold, with a further six (three each side) smaller diamonds rubover and milgrain set in the shoulders leading to a slim, fluted yellow gold shank.

Accompanied by a De Beers Institute of Diamonds grading report. A unique number has been inscribed on this diamond providing utmost security.
Cut:? Old European cut (eight-cuts in the shoulders).
Colour:? I (H to I in the shoulders).

Clarity:? VS1 (VS1 to VS2 in the shoulders).
Carat:? The centre is 0.56 carat, with a further approximate 0.09 carat in the shoulders.
Circa:? 1915.
Size:? K 1/2 (UK) or 5 3/8 (US). Free sizing available.
Measurements:? The diamond is 5.34 x 5.30mm and sits 5.5mm from the finger.
Weight:? 1.47 grams.
Metal:? 18k yellow gold. Tested with a Niton DXL Precious Metal Analyzer.
Item # 119114S420
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.
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