On Yuan Chwang's Travels in India, 629–645 A.D. v1.c8.s14.7

v1.c8.s14.7

Gold, silver, t'u-shih (bronze?), white jade, and crystal lenses are products of the country which are very abundant. Rare precious substances of various kinds from the sea-ports (lit. seabays) are bartered for merchandize. But in the commerce of the country gold and silver coins, cowries, and small pearls are the media of exchange.