Gatsby Jewellery Ltd has dated this piece to the 1900s.
Lovely scroll detailing on the shoulders leads to a nicely substantial D-shaped shank.

Cut – Oval cabochon.
Carat – Approximately 3.00 carat
Circa – 1900.
Measurements – The opal is 13.6 x 8.8mm and sits 5.3mm from the finger.
Size – M 1/2 (UK) or 6.25 (US). Complimentary sizing is available, can go up or down.
Metal – Stamped 18Ct – 18k gold – and tests as such.
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