Gatsby Jewellery Ltd has dated this piece to the 1960s.

Accompanied by an independent jewellery report from IGR (#30308740).
Cut – Oval sapphire cabochon sapphire and old mine cut diamonds.
Colour – The diamonds are F to H.
Clarity – The sapphire is VVS. The diamonds are VS2 to SI2; all are clean to the naked eye.

Carat – The sapphire is approximately 2.20 carat, with a total approximate diamond weight of 0.62 carat.
Circa – 1965.
Size – L (UK) or 5.5 (US). Complimentary sizing is available, can be sized up or down.
Measurements – The head of the ring is 20 x 14.3 and sits 6.9mm from the finger.
Metal – 18k yellow and white gold. Tested.
18AB1233
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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