New Delhi, Aug. 8 -- India's top export industries to the US, including gems and jewellery, and apparel, are bracing for a prolonged downturn after US President Donald Trump on Wednesday announced a steep 50% import tariff, effective 28 August.

The new regime marks a sharp jump from the current 2.1%-13.9% tariff range to 51.3%-63.9%, directly impacting sectors that account for 20% of India's $86 billion in annual exports to the world's largest economy.

Exporters and industry bodies warn the tariffs will render businesses unviable, with diamond and jewellery leaders calling the move "devastating." The Gems and & Jewellery Export Promotion Council (GJEPC) has sought urgent relief, including part tariff reimbursement, while apparel exporte...