Minerals and Metals in Ancient India v1.c28.s9.10

v1.c28.s9.10

Thus it is possible that the items like the seventh century AD. Paunar coins, the eighth-ninth century AD Nālandā bronzes assaying 4-6 per cent iron and all other Indian artefacts produced through three to four millennia and assaying more than 1 per cent iron have been the products of co-smelting under the special physico-chemical conditions which arose only with the somewhat advanced level of technology. Under less advanced conditions the chalcolithic objects contained much less iron.