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Diamond polishers lose their sparkle

9 March 2014 Last updated at 00:19 GMT

An estimated eight out of 10 of the world's diamonds have been cut and polished in Surat in the north-west Indian state of Gujarat.

Yogita Limaye visits the town - where security seems non-existent - and hears how businesses are worrying over the threat from China and volatile currency.

Watch India Business Report

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