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 1920s.

Cut - Oval cut ruby with tapered baguette accent diamonds.
Colour - Deep pinkish red ruby, heated. E colour diamonds.
Clarity - VS.
Carat - The ruby is 3.50 carat. The estimated total diamond weight is 0.35 carat.

Circa - 1920.
Condition - Excellent.
Size - Currently J (UK) or 4 5/8 (US). Complementary sizing is available, can be sized up or down.
Measurements - The ruby measures 9.8mm by 12mm and sits 6mm from the finger.
Metal - Platinum. Unmarked but tested.
Video - To view a video of this ring in daylight, please copy/paste the following into your browser: https://vimeo.com/103577345
Gatsby Jewellery Ltd has dated this piece to the 1920s.
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