According to police, the robbers, with their faces covered by handkerchiefs, barged into the shop Rajashri Jewellers at about 9.15 AM.
Additional Police Commissioner Brijesh Singh said the victim was tied and his hand injured with sharp objects after being threatened by the accused.
The robbers, who came on foot, laid hands on whatever jewellery they could find before fleeing from the spot, he added.
According to the FIR filed at Malad police station, gold jewellery worth Rs 1.30 crore while cash of Rs one lakh was taken away by the accused.
All the check points were alerted and a manhunt has been launched to track the robbers, police said.