Gatsby Jewellery Ltd has dated this piece to the 1900s.
The unusual vented back-hole features decorative hand-engraving - the sort of detail one would only ever find in an antique piece. On a fluted, slim 18k gold shank.

Accompanied by an emerald report from The Gem & Pearl Laboratory stating the emerald shows evidence of significant clarity enhancement, and is Colombian in origin.
Cut:? Emerald cut emerald and old mine cut diamonds.

Colour:? The diamonds range from H to I.
Clarity:? The emerald has visible inclusions (this is common and expected in emeralds). The diamonds range from VS2 to SI2; all are clean to the naked eye.
Carat:? The emerald is approximately 2.80 carat. The total approximate diamond weight is 0.72 carat.

Circa:? 1900.
Size:? L 1/2 (UK) or 5 7/8 (US). Free sizing available.
Measurements:? The emerald is approximately 9.4 x 7.4mm. The head of the ring is approximately 14.6 x 11.5mm and sits 6.3mm from the finger.
Weight:? 3.84 grams.
Metal:? 18k yellow gold. Tested with a Niton DXL Precious Metal Analyzer.
Gatsby Jewellery Ltd has dated this piece to the 1900s.
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