Bullion
From BullionData.com - The World Bullion Database
For the purpose of this site, bullion refers to either a coin (legal tender), round or bar made of a high percentage of precious metal. The major metals used for producing bullion are Gold, Silver, Platinum, Palladium and Copper.
Unlike many "collector" coins with a numismatic value, the intention of holding bullion is as a store of wealth. Prices for common bullion is often tied to the precious metal price, known as the "spot" price. The Spot Price Today section will be able to provide you with the latest live spot prices.
Bullion is measured in weight, usually in either Troy Ounces, Kilograms or Grams.
Some of the most well known bullion coins include the: