The highest level on the clarity grading scale of gemstones. A stone is defined as
flawless when it’s inclusions are not visible according to the scale on which it
ismeasured. For example, diamonds are graded using a loupe at 10x, so termed
flawless where no inclusions are seen at this magnification, whereas emerald
clarity is graded by eye, so termed flawless where it is eye-clear.