In the early 1990s, Hearts and Arrows (aka H&A) began to appear in America, they were much more high-tech than the grading labs were. When GIA began to encounter H&A diamonds, several key characteristics were noted in the report. The diamonds were extremely round, tables were 55-57%, the girdles were medium or thin to medium and polish and symmetry were graded excellent. This kind of consistent cutting was unheard of at the time and cut grading did not exist yet in America.