Coins aren’t just ranked and compared through their face values, but through the use of coin grading. Just like in the collection and trading of precious stones like diamonds where the 3Cs take center-stage, in coin collecting and investment, there’s a benchmark too that’s used to compare and contrast actual values. And this benchmark is called coin grading, or a professional and systematic way of determining the grade (or overall quality and ‘marketability) of the coins in question. Coin grade is critical information for many coin collectors and investment.