Police are hunting for an audacious thief who stole a £3,000 ring from a jewellers in Ely.
CCTV captured the incident on Friday afternoon (September 14), with a man shown feigning interest in the ring, before swiping it and running out of the store.
Staff at The Italian Jewellers in the High Street said they were shaken up by what had happened.
Cambridgeshire Police have appealed for anyone with information to come forward.
The man is described as white, in his 20s, 5'8" to 5'10" and of slim build. He was wearing a black t-shirt and jeans.