Rome police are searching for two well-dressed thieves who walked into Cartier on Via Condotti, distracted a saleswoman, walked off with a euro500,000 ring and disappeared in a crowd of shoppers on the posh shopping street.
Detectives are investigating the Tuesday evening theft. Police are searching for two men, described as foreigners in their 40s.
Rome police couldn't immediately describe the ring, but said two "customers" asked to see the "most expensive" ring in the store. The Italian news agency ANSA said it was studded with diamonds.
Police said witnesses told them the man get into a waiting car with a driver and sped off.
Police refused comment on reports a store videocamera filmed everything. The store's phone went unanswered Tuesday night.