The world's most perfectly cut princess cut diamond in the world. A revolutionary new cut for maximum brilliance For the first time, a Patented Princess with brilliance that rivals an Ideal Round diamond. Other companies have advertising slogans or tag lines that claim their diamonds are the most perfectly cut. But the FireMark has been put to the test by the Gemological Institute of America (GIA), the world foremost diamond authority, and the Gem Certification Assurance Lab (GCAL), a leader in grading the light performance of diamonds. And the results are unprecedented! Unprecedented 98% average light return (95% minimum) Excellent ratings from the GIA in both Polish and Symmetry Excellent grades for Light Performance from GCAL

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