Rings were stolen in a raid on a jewellery shop in Newmarket on Friday, March 21.
The incident happened on Friday March 18 at around 2.20pm in High Street.
A man entered the shop, posing as a customer, asked to see two rings and then snatched them from the shop assistant. He ran off down Sun Lane.
The shop assistant was not injured.
The offender is described as a white man, with auburn coloured hair, between 20 to 30-years-old, of a slim build, clean shaven, was wearing a black coloured suit and tie, and black Nike trainers.
Anyone who witnessed the incident or has any information is asked to contact Newmarket Police on 101 quoting CAD 206 of today, or Crimestoppers anonymously on 0800 555111.