***Auction Highlight*** PCGS 2000-w Library of Congress Modern Commem $10 Graded pr69 dcam By PCGS. in the year 2000, the U.S. Mint produced its first and only ringed bi-metallic coin, which happens to be the 2000 Library of Congress Commemorative $10 coin. It is composed of a .900 fine outer gold ring and a quarter-ounce center of .9995 fine platinum. Noteworthy, the coin also boasts one of the lowest mintages of any modern coin.Not just did the Mint produce these coins out of bi-metallic metals but it also produced the coins out of two very expensive metals. Gold was one of the metals used to produce the coins while platinum was the second metal that was also used. The gold content is located in the outer ring of the coin while the platinum metal is located in the inner ring of the coin.It is unknown why the U.S. Mint chose the Library of Congress Commemorative as its first bi-metallic coin when it could have used any other U.S. coin. However, since the coin was produced for the year 2000, it wouldn’t be surprising if the Mint used this coin to demonstrate its advanced minting techniques in the new millennium year.Despite the coins unique characteristics, it is also one of the lowest mintage commemorative coins in existence. The total mintage of 7,261 coins is a relatively low mintage compared to all other commemorative coins. It contains both a ¼ ounce of platinum and a ¼ ounce of gold.