For all the innovations that Pagan Dynasty introduced, one area that it regressed was the use of coinage. The Pyu practice of issuing gold and silver coinage was not retained. The common medium of exchange was lump silver "coinage", followed by gold and copper lump coinage. Silver came from domestic mines as well as Yunnan. The base unit of currency of the silver "kyat" (), which was not a unit of value but rather a unit of weight at approximately 16.3293 grams. Other weight-based units in relation to the "kyat" were also in use.