Evaluating the clarity of a diamond involves determining the number, size, and position of these characteristics. This information is then used to determine the diamond clarity. The overall general appearance of the stone will also help determine the final grade. A flawless diamond has no inclusions or blemishes visible at 10x magnification, while I3 diamonds have imperfections that are easily visible without a microscope. No natural diamond is perfect, but near-perfect stones have higher values.