Mr Kachami is accused of pointing the gun at the head of an employee of the Melbourne Gold Company in Collins Street at 9.40am, before leaving with almost $4 million worth of gold bullion, jewellery and cash.
An employee of the Melbourne Gold Company was allegedly threatened with a gun and assaulted, before the entire contents of a safe were removed with a trolley.
Mr Kachami was charged on April 30 with armed robbery, theft, false imprisonment, assault and two counts of possessing a handgun as a non-prohibited person after police found the loot buried at a rural property near the Gippsland town of Dollar.
Mr Kachami will next face court on July 24.
Police have also searched properties in Hawthorn East and Fitzroy as part of their investigation.
A 48-year-old Hawthorn East woman was also arrested on April 29, however she was released pending further inquiries.
Armed crime squad detectives on Monday released CCTV footage of a vehicle they believe may be connected to the theft.
Police are now searching for the owner of a white Holden Commodore ute that was spotted in Anderson Street, Leongatha, about 1pm on April 30.
The vehicle has black slimline plates with registration beginning with the letters HA.
According to police, the driver was Caucasian in appearance and aged in his early 40s. He was wearing a blue jacket with red on it.
It is believed the man was travelling to the town of Dollar, before he became lost and asked for directions.
The investigation into the incident remains ongoing and anyone with any information urged to contact Crime Stoppers on 1800 333 000 or submit a confidential crime report to www.crimestoppersvic.com.au
Simone is a crime reporter for The Age. Most recently she covered breaking news for The Age, and before that for The Australian in Melbourne.