Denarius Debasement of the coin's silver content continued after Nero. Later Roman emperors reduced its content to 3 grams around the late 3rd century. The value at its introduction was 10 asses, giving the denarius its name, which translates as "containing ten". In about 141 BC, it was re-tariffed at 16 asses, to reflect the decrease in weight of the as. The denarius continued to be the main coin of the Roman Empire until it was replaced by the antoninianus in the middle of the 3rd century. The coin was last issued, in bronze, under Aurelian between AD 270 and 275,
Silver coin northern India between (1540–1545). It was used for the silver coin weighing 178 grains. He also introduced copper coins called "Dam" and gold coins called "Mohur" that weighed 169 grains. Later on, the Mughal Emperors standardised this coinage of tri-metalism across the sub-continent in order to consolidate the monetary system. With the Spanish colonization of the Americas after 1492, there were significant finds in both New Spain (Mexico) in various sites in mainly in the zone outside indigenous settlement and in Peru, with the discovery of the great silver mine of Potosí (in modern Bolivia). The Spanish crown licensed mining