Whether you are an enthusiastic numismatic or a novice, or whether you are into American numismatics, world coins, bullion or ancients, there are probably certain coins that are you covet than all coins. There are some coins that are the crème de la crème in the world of numismatics. Not only are they significant in terms of their value, but these coins are quite rare.

Each of these coins have interesting stories attached to them, which adds to their value.

1955/55 Doubled Die Lincoln Cent
This coin is an error coin. Nonetheless, keen Lincoln penny collectors have an avid interest in this coin. This coin was the result of a simple error during minting. While minting this coin, the United States Mint used a coin die that had two impressions that were offset from each other. After minting, a batch of this coin (about 20,000 to 24,000 coins) were mixed with a batch of correctly minted coins. Since, it was not worth melting the whole batch of pennies, the mint decided to keep the doubled die cent in circulation. However, after the story was published in newspapers, many people pulled the coin from use.

$1 Million Gold Canadian Maple Leaf
This coin is the first, and perhaps the only, million dollar coin to have been ever minted in the world. With 3cm thickness and diameter of 50cm, this coin was minted by the Royal Canadian Mint in 2007. It is made of 3527 ounces of 99.999% pure gold. On one side, the coin has an impression of Queen Elizabeth II. On the other side, it has three maple leaves printed on it. There are five of these coins, owned by investors all over the world. The last of these coins was auctioned at a value of approximately $4.02 million in June 2010.

1974 Silver Dollar
The first dollar coin minted by the newly formed US Federal mint is worth approximately $10 million. This coin made of 10 percent copper and 90 percent silver was issued by the US Federal Government in 1794 and 1795. Also known as the Flowing Hair dollar, this coin has an image of the bust of Liberty with flowing tresses. The most expensive coin possessed by a private collector, this coin is quite significant historically.