What Is An Un-circulated Coin?
You may have heard the terms proof coin and un-circulated coin, but what's the difference between these two? To understand the difference between a proof and un-circulated coin, let's first answer the question, "What is an un-circulated coin?" Un-circulated means a coin has not had any wear, such as the wear a coin might experience when it is used in commerce. Handling a coin, as well as improperly storing a coin, can result in wear on the surface of the coin. This wear, even if very minor, will cause a coin to no longer grade un-circulated. When coins are minted they often bump into each other and receive small nicks and abrasion marks during the production process. These marks also occur as coins are transported in large canvas bags.

These marks, sometimes called "bag marks", are more noticeable on larger coins, such as half dollars and dollars. Typical "bag marks" do not keep a coin from grading un-circulated. However, they can be an indicator of how high of a grade the un-circulated coin might receive. Current accepted grading standards provide for a range of un-circulated grades, from the grade of MS-60 to MS-70. MS60 would be a lower grade (yet still) un-circulated coin with normal bag marks for that type of coin.

Anything below MS-60 would not be considered un-circulated. MS70 would be the perfect "ideal" coin. Some coins are rare in grades MS65 to MS70, and even unheard of in MS70 grade. (The attribute "MS" stands for

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