The appearance of a diamond depends more on its cut than anything else.
Brightness is commonly referred to as "brilliance" and is the effect of light from the diamonds external and internal reflections.
Fire is the dispersion of light into the colors of the spectrum.
Scintillation is the pattern and flashes of light and dark areas
As a general rule, the higher the cut grade, the brighter the diamond.
Generally, yes. Cut grades ranging from Good, Fair, and Poor will inhibit the interaction with light and therefore negatively affect the overall attractiveness.
A beautifully finished diamond is dazzling, with every facet displaying the craftsman’s skill and care. When a diamond interacts with light, every angle and every facet affects the amount of light returned to the eye.
Use the interactive tool below to compare the difference in cut grades.
Subtle differences in cut grade can dramatically affect diamond value. Two diamonds of the same carat weight, color, and clarity can differ in value based on cut grade alone