A typical appraisal process takes about fifteen minutes.
First, the appraiser will test the diamond with nitric acid. Then he or she will measure the height and width, and weigh it. This will determine the diamond's carat size.
Than, he or she will inspect the diamonds surface with a 10x magnifying glass for any inclusions. This will help him or her determine the clarity of the diamond.
Determining a diamond's color maybe the hardest part of all. Experience plays a huge factor here. Placing the diamond on a white piece of paper to determine the color is the most common practice.