H Color Diamond. Licensed under cc by 2.0. Red stones are the most rare of the fancy colored diamonds.
The customer looking for a white diamond without a distracting color shade, but also a higher cut, color and/or clarity, should choose the g or h colored diamond. The faint yellow tone of h color grade diamonds is only visible in direct comparison to a better grade diamond. It has the benefit of appearing extremely colorless to viewers in normal wear, without commanding a high premium.