For Kalpesh Patel, Diwali, the festival of lights celebrated across India, might well mark lights out for his eight-year-old diamond cutting and polishing unit.

The 35-year-old employs about 40 workers who transform rough diamonds into perfectly polished gems for exports at the small factory in Surat, a city located in the western Indian state of Gujarat.

His business has survived multiple speed bumps in recent years. But United States President Donald Trump’s mammoth 50 percent tariffs on imports from India might be the final nail in the coffin for his unit, part of an already struggling natural diamond industry, he said.

“We still have some orders for Diwali and will try to complete them,” he told Al Jazeera.

Diwali, arguably India’s single biggest festival, scheduled for late Octo

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