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About Good
The grade AG-3. The grade of a coin that falls short of Good. Only the main features  
of the coin are present in this grade. Peripheral lettering, date, stars, etc. sometimes
are partially worn away.

About Uncirculated
The grades AU50, 53, 55, and 58. A coin that on first glance appears Uncirculated but
upon closer inspection has slight friction or rub

Alloy
A combination of two or more metals.

American Eagle
In 1986, the U.S. Mint began selling silver bullion coins in the denomination of $1.
The next year, they added a series of gold coins to the series, eventually expanding
to 1/10, ¼, ½, and 1 ounce gold versions. Each coin features a family of eagles on the
reverse, hence the name.

Ask
The selling quotation of a coin either on a trading network, pricing newsletter, or
other medium.

Assay
To analyze and determine the purity of a metallic alloy.

Auction
An offering of coins for sale where the buyer must bid against other potential  
buyers, as opposed to ordering from a catalog, price list, or advertisement at a set
price.

Authentication
The process of determining the genuineness of a coin or other numismatic item.