History of Chemistry in Ancient and Medieval India, Incorporating the History of Hindu Chemistry by Acharya Prafulla Chandra Ray c12.s1.11

c12.s1.11

This seems to indicate that the silver was obtained by smelting argentiferous lead ore associated with cuprite of which the cerussite, found at Baluchistan, might be a probable source. The process of extracting silver from lead was undoubtedly known to the people of the Indus Valley. Silver might have been obtained also from Afghanistan and Persia. From Persia, too, gold may have been obtained and more certainly tin and lead.