New Delhi, Aug. 3 -- Exports of Indian natural polished diamonds to the US - contributing 35 per cent of total exports in fiscal 2025 - is set to face further headwinds following the tariffs and penalty announced by the US, said Crisil Ratings officials.

An official of the ratings agency noted that the demand for natural diamonds in the US market has slowed already.

"Added to this, reduced offtake by retailers post announcement of 10 per cent tariff on Indian exports in April 2025, brought down the share of the US in polished diamond exports to 24 per cent in the first quarter of this fiscal from 37 per cent for the same period last fiscal," said Rahul Guha, Senior Director at Crisil Ratings.

"In the milieu, the revenue of Indian diamo...