Robert Belcher Antiques has dated this piece to the 1930s.
At the centre, there is a diamond held in place with a star shaped setting.

The ring is fully hallmarked for Birmingham 1930-31. Together with a maker's mark KBSP and a series of registration numbers for the ring design.
The ring size is S, and it comes with its original box, which shows some signs of age related wear.
Robert Belcher Antiques has dated this piece to the 1930s.
Robert belcher antiques was established in 1984 and is a high quality retailer of interesting, rare antiques and decorative items.
You can view the stock and full dealer information on the Robert Belcher Antiques Profile Page