A “grade” is described as a shorthand designed by coin experts (numismatists) to reveal a coins appearance. Simply put, if a certain coin collector tells another collector that he owns an uncirculated Charlotte 50 half eagle, both should already have a concept of the coins appearance without even seeing it, because of the claim of its grade.
Some disclose that designating a grade to rank or categorize a coin is more of an art rather than science, since often it is extremely subjective or biased; this applies particularly when working on Mint State coins where little differences, in terms of grade, make so much difference in the price.
Grading can be learned, studied and applied with a predictable and known outcome that eventually depends on judgment, not feelings.
Like any language, science, sport, or research, it is best to learn and understand coin grading one component at a time, through serious study and experience.
Today, most numismatists use the Sheldon grading scale. While there are those that complain of “too many grades”, most experienced coin graders recognize and appreciate the fact that there is a wide range in...