Dahlonega Mint

The Dahlonega Mint was a former branch of the United States Mint built during the Georgia Gold Rush to help the miners get their gold assayed and minted, without having to travel to the Philadelphia Mint. It was located at in Dahlonega, Lumpkin County, Georgia. Coins produced at the Dahlonega Mint bear the "D" mint mark. That mint mark is used today by the Denver Mint, which opened many years after the Dahlonega Mint closed. All coins from the Dahlonega Mint are gold, in the $1, $2.50, $3, and $5 denominations, and bear dates in the range 1838–1861.
Nickel (United States coin)

A nickel, in American usage, is a five-cent coin struck by the United States Mint. Composed of 75% copper and 25% nickel, the piece has been issued since 1866. Its diameter is .835 inches and its thickness is .077 inches (1.95 mm). Due to inflation, the purchasing power of the nickel continues to drop and currently the coin represents less than 1% of the federal hourly minimum wage. In 2015, over 1.5 billion nickels were produced at the Philadelphia and Denver mints.
United States Mint

The United States Mint is a unit of the Department of Treasury responsible for producing coinage for the United States to conduct its trade and commerce, as well as controlling the movement of bullion. It does not produce paper money; that responsibility belongs to the Bureau of Engraving and Printing. The Mint was created in Philadelphia in 1792, and soon joined by other centers, whose coins were identified by their own mint marks. There are currently four active coin-producing mints: Philadelphia, Denver, San Francisco, and West Point.
Solidus (coin)

The solidus, nomisma, or bezant was originally a relatively pure gold coin issued in the Late Roman Empire. Under Constantine, who introduced it on a wide scale, it had a weight of about 4.5 grams. It was largely replaced in Western Europe by Pepin the Short's currency reform, which introduced the silver-based pound/shilling/penny system, under which the shilling functioned as a unit of account equivalent to 12 pence, eventually developing into the French sou. In Eastern Europe, the nomisma was gradually debased by the Byzantine emperors until it was abolished by Alexius I in 1092, who replaced it with the hyperpyron, which also came to be known as a "bezant". The Byzantine solidus also inspired the originally slightly less pure Arab dinar.
Coinage Act of 1792

The Coinage Act or the Mint Act, passed by the United States Congress on April 2, 1792, created the United States dollar as the country's standard unit of money, established the United States Mint, and regulated the coinage of the United States. The long title of the legislation is An act establishing a mint, and regulating the Coins of the United States. This act established the silver dollar as the unit of money in the United States, declared it to be lawful tender, and created a decimal system for U.S. currency.
Ducat

The ducat was a gold or silver coin used as a trade coin in Europe from the later Middle Ages until as late as the 20th century. Many types of ducats had various metallic content and purchasing power throughout the period. The gold ducat of Venice gained wide international acceptance, like the medieval Byzantine hyperpyron and the Florentine florin, or the modern British Pound sterling and the United States dollar.
New Orleans Mint

The New Orleans Mint operated in New Orleans, Louisiana, as a branch mint of the United States Mint from 1838 to 1861 and from 1879 to 1909. During its years of operation, it produced over 427 million gold and silver coins of nearly every American denomination, with a total face value of over US$ 307 million. It was closed during most of the American Civil War and Reconstruction.
Pattern coin

A pattern coin is a coin which has not been approved for release, produced for the purpose of evaluating a proposed coin design. They are often off-metal strike, to proof standard or piedforts. They are collected or studied by many coin collectors because of their historical importance. A high number of the world's most valuable coins are patterns, and nearly a quarter of the pieces listed in 100 Greatest US Coins are pattern coins.
Indian Head cent

The Indian Head cent, also known as an Indian Head penny, was a one-cent coin ($0.01) produced by the United States Bureau of the Mint from 1859 to 1909. It was designed by James Barton Longacre, the Chief Engraver at the Philadelphia Mint.
Charlotte Mint

The Charlotte Mint was the first United States branch mint. It was located in Charlotte, North Carolina and specialized in gold coinage.
Three-dollar piece

The three-dollar piece was a gold coin produced by the United States Bureau of the Mint from 1854 to 1889. Authorized by the Act of February 21, 1853, the coin was designed by Mint Chief Engraver James B. Longacre. The obverse bears a representation of Lady Liberty wearing a headdress of a Native American princess and the reverse a wreath of corn, wheat, cotton, and tobacco.
Gold dollar

The gold dollar or gold one-dollar piece is a gold coin that was struck as a regular issue by the United States Bureau of the Mint from 1849 to 1889. The coin had three types over its lifetime, all designed by Mint Chief Engraver James B. Longacre. The Type 1 issue has the smallest diameter of any United States coin minted to date.
United States dollar

The United States dollar is the official currency of the United States and its territories per the United States Constitution since 1792. In practice, the dollar is divided into 100 smaller cent (¢) units, but is occasionally divided into 1000 mills (₥) for accounting. The circulating paper money consists of Federal Reserve Notes that are denominated in United States dollars.
Lincoln cent

The Lincoln cent is a one-cent coin that has been struck by the United States Mint since 1909. The obverse or heads side was designed by Victor David Brenner, as was the original reverse. The coin has seen several reverse, or tails, designs and now bears one by Lyndall Bass depicting a Union shield. All coins struck by the United States government with a value of 1/100 of a dollar are called cents because the United States has always minted coins using decimals. The penny nickname is a carryover from the coins struck in England, which went to decimals for coins in 1971.
Three-cent silver

The three-cent silver, also known as the three-cent piece in silver or trime, was struck by the Mint of the United States for circulation from 1851 to 1872, and as a proof coin in 1873. Designed by the Mint's chief engraver, James B. Longacre, it circulated well while other silver coinage was being hoarded and melted, but once that problem was addressed, became less used. It was abolished by Congress with the Coinage Act of 1873.