Gatsby Jewellery Ltd has dated this piece to the 1910s.
The centre is surround by eight nice and chunky old mine cut diamonds in platinum rubover settings, with sweeping curtain detailing in the gallery. On a slim and tapering 18k yellow gold shank.

Accompanied by an independent jewellery report from IGR (#30310060).
Cut – Oval cabochon opal and old mine cut diamonds.
Colour – The diamonds range from F to H.
Clarity – The diamonds are SI1 to SI2.
Carat – The opal is approximately 0.84 carat, with an approximate diamond weight of 0.80 carat.

Circa – 1910.
Size – P 1/2 (UK) or 7.75 (US). Complimentary sizing is available, can be sized up or down.
Measurements – The head of the ring is 15.3 x 13.6mm and sits 4mm from the finger.
Metal – Stamped 18CT PLAT indicating 18k yellow gold and platinum, and tests as such.
Video – To view a video of this ring recorded in daylight, please copy / paste the following link into your browser: https://vimeo.com/840093516
Gatsby Jewellery Ltd has dated this piece to the 1910s.
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