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 introduction: Privately minted "silver rounds" or "generic silver rounds" are called "rounds" instead of "coins" because the US Mint and other government mints reserves the use of the word "coin" for Government Issued currency with a face value expressed in the national currency. The privately minted "rounds" usually have a set weight of 1 troy ounce of silver (31.103 grams of 99.9% silver), with the dimensions of 2.54 mm thick and 39 mm across. These carry all sorts of designs, from assayer/mine backed bullion to engravable gifts, automobiles, firearms, armed forces commemorative, and holidays. Unlike silver bullion coins, silver rounds