"A gold coin is a coin that is made mostly or entirely of gold. Most gold coins minted since 1800 are 90–92% gold (22 karat), while ...
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most of today´s gold bullion coins are pure gold, such as the Britannia, Canadian Maple Leaf, and American Buffalo. Alloyed gold coins, like the American Gold Eagle and South African Krugerrand, are typically 91.7% gold by weight, with the remainder being silver and copper.
Traditionally (up to about the 1930s), gold coins have been circulation coins, including coin-like bracteates and dinars.[clarification needed][the link does not explain what a "coin-like" dinar is] Since recent decades, however, gold coins are mainly produced as bullion coins to investors and as commemorative coins to collectors. While modern gold coins are also legal tender, they are not observed in everyday financial transactions, as the metal value normally exceeds the nominal value. For example, the American Gold Eagle, given a denomination of 50 USD, has a metal value of more than $1,300 USD." - (en.wikipedia.org 05.10.2019)
