People are being warned not to fall for a jewellery scam currently operating in and around Nottingham.
Although police have said they have had only one report of fake rings being sold, a Nottingham jeweller said 30 people had visited him for valuations.
BBC Radio Nottingham has also received reports of people being approached for money for food and in exchange, a gold ring is sold.
Police have advised people to only buy jewellery from reputable suppliers.
David Heath, from J Herberts jewellers on Wheelergate, Nottingham, said about 30 people had visited him with gold rings in the past two weeks.
"People have bought rings from various places including pubs, on the street and some have even been stopped in their cars.
"It's usually women selling them saying they need food for their families. But although the rings are stamped with 18CT, the rings are only worth a few pounds as they are brass," he said.
Mr Heath added a genuine 18-carat gold ring in the style of the fakes would be worth between £500 and £600.
Similar scams have also been reported in parts of Lincolnshire and Derbyshire.