by D. Gordon » Jun 3, 2001 Since the term "value" is often associated with the term "rarity" I wonder if anyone has the statistics on "rarity". For instance what percent of all gem diamonds are of different sizes .5 to 1, 1 to 1.5, 1.5 to 2.0, etc.? What percent of all gem diamonds are in the different color and clarity grades? Lastly, what percent of RB gem grade diamonds have attractive (in the eye of the beholder I know) cuts? Does GIA list these statistics as a percent of all the diamonds they grade? Where can I get this information? Any help is sincerely appreciated.