Most factories in Morbi, India's ceramics hub in the western state of Gujarat, have shut down for nearly a month due to gas shortages triggered by the Iran war, according to the local manufacturers' association.
Morbi produces about 80% of India's ceramics - mainly tiles and sanitaryware - and exports to the Middle East, Africa and Europe.
Manufacturers say they halted operations on Tuesday after supplies of propane and natural gas - key fuels for ceramics production - were squeezed.
India's ceramics industry is estimated to be worth about 750bn rupees ($8.1bn; £6bn), with Morbi at its core. The shutdown has hit around 400,000 workers linked to the sector.
The US and Israel launched strikes on Iran on 28 February, triggering retaliation and disrupting shipping through the Strait of Hormuz - a key route for much of India's gas imports.
