A diamond’s Clarity grade is determined by the number, size, and location of the imperfections that are located with in a diamond. Inclusions are internal flaws with in the stone and blemishes are external flaws on the stone. Since all diamond and their imperfections are different, it is up to the purchaser to determine which imperfection they feel comfortable with. Beauty is always in the eye of the beholder! It is most important to purchase an “eye clean” stone, which means that to the naked eye you cannot see any imperfections, meaning the light passing through is not effected. These stones are usually VS1, VS2, SI1 and sometimes a good SI2. Often times an inclusion can be hidden once mounted by a prong.