These FTC limitations undoubtedly recommended the fresh establishment out of today’s GIA colour leveling system. The new GIA progressing program didn’t come with location for the effect of fluorescence for the colour plus the desirability out of fluorescence within the a great diamond started initially to wane in the many years one followed. You will find mathematical advice on the basics and you may length ratios at the which the diamond is meant to become cut-in purchase in order to reflect just as much light. Bullet practical expensive diamonds, the most popular, are directed because of the these specific guidance, whether or not adore reduce rocks can’t be because the truthfully guided from the analytical facts. Diamonds and this reveal very little lines out of colour is graded because the Grams or H color diamonds.