The small zip-up bag was filled with precious jewellery.

The small zip-up bag was filled with precious jewellery. Photo: Victoria Police

A shopper who paid a few dollars for a second-hand bag at an opportunity shop on the Mornington Peninsula was stunned to find a stash of valuable jewellery inside.

Police are now appealing for the owner of the pink zip-up bag — which was donated to the Rosebud Opportunity Shop early this year — to come forward and claim it.

A Victoria Police spokeswoman said a woman bought the bag from the Point Nepean Road shop on March 19, and later discovered the jewellery stash inside.

The collection includes many gold rings, a gold chain bracelet, watches, earrings and necklaces, and several of the items are believed to be valuable antiques.

The woman handed the bag in at Rosebud Police Station, and police are now appealing for the owner to come forward.

They will have to provide a description of the contents of the bag.

Anyone with information has been urged to contact Crime Stoppers on 1800 333 000 or visit www.crimestoppers.com.au.