Large gold bars are produced by pouring the molten metal into molds. Smaller bars may be manufactured by minting or stamping from appropriately rolled gold sheets. The standard gold bar held as gold reserves by central banks and traded among bullion dealers is the 400-troy-ouncegood gold delivery gold bar. The kilobar, which is 1,000 grams bin mass, and a 100 troy ounce gold bar are the bars that are more manageable and are used extensively for trading and investment.
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