Almost a dozen Melbourne jewellery stores have been robbed in brazen smash and grab heists in the past nine months and police say they are liaising with jewellers to help them beef up security.

In the latest robbery, four men armed with crowbars and other weapons smashed up and robbed Jafari Jewellery on Burke Road in Malvern just before noon on Thursday.

The owner was forced to flee as the men filled their bags before running to a getaway car carrying trays of jewels.

"We need some safety. We work very hard," Mohammed Jafari told 3AW on Thursday.

"Everything is smashed. There were four people inside, big men, all of them."

Victoria Police Assistant Commissioner Robert Hill said he understands business owners and the community are concerned.

"These incidents are the subject to thorough, ongoing investigations and police have already charged over 30 people in relation to this offending in the past 12 months," Mr Hill said.

Police have been speaking with store owners about how they can adopt a number of crime prevention measures.

The Malvern robbery follows a smash and grab at Waverley Gardens Shopping Centre on Wednesday in which axe wielding robbers smashed up the store.

There have been over a dozen jewellery store robberies across Melbourne in past 10 months, with shops targeted in Toorak, Elsternwick, Reservoir, Coburg, South Yarra, Canterbury, Lalor and the CBD.

Some stores, including H&H jewellery in Elsternwick, have been hit multiple times.

© AAP 2019