It was listed by Gatsby Jewellery Ltd. Sold pieces stay on Sellingantiques as a record of what has passed through, and the next one is rarely far away.
Gatsby Jewellery Ltd has dated this piece to the 1890s.

Cut - Opals are oval cabochon. Diamonds are rose cut.
Colour - Very lively opals. Diamonds are H.
Clarity - Diamonds are eye-clean.
Carat - Approximate total opal weight of 1.00 carat. Each of the diamonds is estimated at 0.05 carat, so 0.40 total.

Circa - 1890.
Condition - Some minor wear and tear on the band which can be polished out if you want this look brand new.
Size - Currently P (UK) or 7 1/2 (US). Complementary sizing is available, can go up or down.
Measurements - The spread of the opals is 19mm across, 6mm wide. Top of the ring sits 3.5mm from the finger.
Metal - 18k yellow gold. "18CT" is clearly stamped inside of the band.
Gatsby Jewellery Ltd has dated this piece to the 1890s.
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