The 4Cs
Understand GIA Excellent / Very Good grading, brilliance, fire, and why cut is often the strongest driver of visible beauty.
Cut dictates how crisply light refracts toward your eye—the reason two diamonds can share specs yet look unmistakably different.
Open the interactive explorer to exaggerate brilliance vs softness while you skim this copy.
Fancies use different symmetry targets; always reconcile vendor videos with pavilion depth photography.