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 1930s.
A daring but unambiguously successful design. Top marks.

Cut - Emerald cut ruby and old mine / miner cut diamonds
Colour - Diamonds are G.
Clarity - Diamonds are VS. The ruby has visible inclusions, but these do not effect the vibrancy of the stone.
Carat - The ruby is approximately 2.50 carat, the total estimated diamond weight is 0.96 carat

Circa - 1935.
Size - P (UK) or 7.5 (US). Complementary sizing is available, can go up or down.
Measurements - The outer edge of one diamond to the other is 19.25mm and 10mm wide at the widest point. Sits 5mm from the finger.
Metal - 18k gold. Tested.
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.
You can view the stock and full dealer information on the Gatsby Jewellery Ltd Profile Page