When a gemstone is flawless, it does not have any discernible or visible blemishes. To determine whether a gemstone is flawless, a gemologist has to examine it using a benchmark of 10x magnification. Most gemstones have at least a few inclusions or blemishes so finding one that has none is very rare. In fact, flawless gemstones are even more rare than flawless diamonds. The number of flaws a cut stone will have is determined by the process within the earth that created them.
