Gatsby Jewellery Ltd has dated this piece to the 1960s.
Although the ring looks to have been crafted entirely in 18k yellow gold, the metal at the back of the baguettes is 18k white gold, making the diamonds to truly pop.

Accompanied by a jewellery report from IGR.
Cut:? Round brilliant cut diamond in the centre, with tapered baguettes in the surround.
Colour:? The centre is G. The tapered baguettes are F to G.
Clarity:? The centre is SI2 (clean to the naked eye). The tapered baguettes are VVS2.

Carat:? The centre is approximately 1.00 carat, with a further approximate 2.00 carat of tapered baguette diamonds in the surround.
Circa:? 1965.
Size:? L 1/2 (UK) or 5 7/8 (US). Free sizing available.
Measurements:? The centre diamond is 6.5mm in diameter. The head of the ring is 14.05 x 13.6mm and sits 7.8mm from the finger.
Weight:? 4.55 grams.
Metal:? Stamped '750' indicating 18k yellow gold, and tested with a Niton DXL Precious Metal Analyzer to confirm.
Item # 881112S051
Gatsby Jewellery Ltd has dated this piece to the 1960s.
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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