Bullion coin in the context of "Native silver"

Silver is a chemical element; it has symbol Ag (from Latin argentum 'silver') and atomic number 47. A soft, whitish-gray, lustrous transition metal, it exhibits the highest electrical conductivity, thermal conductivity, and reflectivity of any metal. Silver is found in the Earth's crust in the pure, free elemental form ("native silver"), as an alloy with gold and other metals, and in minerals such as argentite and chlorargyrite. Most silver is produced as a byproduct of copper, gold, lead, and zinc refining.

Silver has long been valued as a precious metal, commonly sold and marketed beside gold and platinum. Silver metal is used in many bullion coins, sometimes alongside gold: while it is more abundant than gold, it is much less abundant as a native metal. Its purity is typically measured on a per-mille basis; a 94%-pure alloy is described as "0.940 fine". As one of the seven metals of antiquity, silver has had an enduring role in most human cultures. In terms of scarcity, silver is the most abundant of the big three precious metals—platinum, gold, and silver—among these, platinum is the rarest with around 139 troy ounces of silver mined for every one ounce of platinum.

Bullion is non-ferrous metal that has been refined to a high standard of elemental purity. The term is ordinarily applied to bulk metal used in the production of coins and especially to precious metals such as gold and silver. It comes from the Anglo-Norman term for a melting-house where metal was refined, and earlier from French bouillon, "boiling". Although precious metal bullion is no longer used to make coins for general circulation, it continues to be held as an investment with a reputation for stability in periods of economic uncertainty. To assess the purity of gold bullion, the centuries-old technique of fire assay is still employed, together with modern spectroscopic instrumentation, to accurately determine its quality.

Bullion is sometimes contrasted with specie, the latter being coin made of bullion (or synonymously, bullion coin). Thus understood, bullion refers to precious metal kept in forms other than coin, namely bars, ingots, or plates, including regional and historical variants such as grivnas in Eastern Europe or sycees in China.

A gold coin is a coin that is made mostly or entirely of gold. Most gold coins minted since 1800 are 900–920 ‰ gold (22‑karat), while 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 917 ‰ gold by weight, with the remainder being silver and copper.

Until about the 1930s, gold coins were circulation coins, including coin-like bracteates and dinars. Since then, gold coins have mainly been produced as bullion coins for investors and as commemorative coins for collectors. While modern gold coins are still legal tender, they are not used in everyday financial transactions, as the metal value invariably exceeds the nominal value. For example, the quarter-ounce American Gold Eagle has a denomination of $10, but a metal value of approximately $500 (as of January 2024).

Coins of the United States dollar – aside from those of the earlier Continental currency – were first minted in 1792. New coins have been produced annually and they comprise a significant aspect of the United States currency system. Circulating coins exist in denominations of 1¢ (i.e. 1 cent or $0.01), 5¢, 10¢, 25¢, 50¢, and $1.00. Also minted are bullion, including gold, silver and platinum, and commemorative coins. All of these are produced by the United States Mint. The coins are then sold to Federal Reserve Banks which in turn put coins into circulation and withdraw them as demanded by the United States economy.

Swissmint is the official mint of the Swiss Confederation. Located in the Swiss federal city Bern, it is responsible for manufacturing Swiss franc coins, both of the currency and bullion variety. Apart from making coins for the government, Swissmint also manufactures medals and commemorative coins for private customers.

The Britannia is a bullion coin issued by the Royal Mint. It has been minted in gold since 1987, in silver since 1997, and in platinum since 2018. The reverse of the coin patterns feature various depictions of Britannia, a feminine personification of the United Kingdom, while the obverse features the effigy of the monarch of the United Kingdom with the legend around it.

Britannia gold coins contain one troy ounce of gold and have a face value of £100. Gold Britannias also are issued in fractional sizes of one-half, one-quarter, and one-tenth of a troy ounce and with face values of £50, £25, and £10 respectively. In 2013, two additional sizes were introduced, a five-ounce coin of face value £500, and a fractional size of one-twentieth of face value £5.

The American Buffalo, also known as a gold buffalo, is a 24-karat bullion coin first offered for sale by the United States Mint in 2006. The coin follows the design of the Indian Head nickel and has gained its nickname from the American Bison on the reverse side of the design. This was the first time the United States government minted pure (.9999) 24-karat gold coins for the public. The coin contains one-troy ounce (31.1g) of pure gold and has a legal tender (face) value of US$50. Due to a combination of the coin's popularity and the increase in the price of gold, the coin's value has increased considerably. The initial 2006 U.S. Mint price of the proof coin was $800. In 2007 the price was $899.95, $1,410 in 2009, $2,010 in 2011, and $3,590 in 2024.

In addition to requiring a presidential dollar coin series to begin in 2007 and redesigning the cent in 2009, the Presidential $1 Coin Act of 2005 mandated the production of a one-ounce 24-karat gold bullion coin with a face value of $50 and a mintage limit of up to 300,000 coins.

The American Gold Eagle is an official gold bullion coin of the United States. Authorized under the Gold Bullion Coin Act of 1985, it was first released by the United States Mint in 1986. Because the term "eagle" also is the official United States designation for the pre-1933 ten dollar gold coin, the weight of the bullion coin is typically used when describing American Gold Eagles (e.g., "1/2-ounce American Gold Eagle") to avoid confusion with the pre-1933 coins. This is particularly true with the 1/4-oz American Gold Eagle, which has a marked face value of ten dollars, the same as that of its predecessor.