Gatsby Jewellery Ltd has dated this piece to the 1930s.
Set opposite the diamond is a strong bright green cushion cut Colombian emerald. Each stone is secured in eight-claw coronet collets which nestle within a slim and elegantly sweeping platinum shank.

Accompanied by an independent jewellery report from IGR (#30309418).
Cut – Old mine cut diamond and cushion cut emerald.
Colour – The diamond is L.
Clarity – The diamond is SI2 (clean to the naked eye). The emerald has some visible inclusion which is typical and expected of emeralds.

Carat – The diamond is a known 0.74 carat. The emerald is approximately 0.60 carat.
Circa – 1930.
Size – M (UK) or 6 (US). Complimentary sizing is available, can be sized up or down.
Measurements – The ring is 7.6mm at the widest point and sits 5.2mm from the finger.
Metal – Stamped PLAT – platinum – and tests as such.
Gatsby Jewellery Ltd has dated this piece to the 1930s.
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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