Which part makes a significant contribution to a diamond's brightness and fire?

Which part makes a significant contribution to a diamond's brightness and fire?

• A. Table
• B. Girdle
• C. Pavilion
• D. Culet

Answer: (C)

Brightness and fire come from how light is trapped and redirected inside the diamond. The pavilion—the lower portion beneath the girdle—faces and facets are arranged to catch light that enters through the crown and table and bounce it back up through the crown. When the pavilion angles and facet alignments are well proportioned, light is reflected efficiently and exits through the top, producing strong brightness and dispersion (fire). If the pavilion geometry isn’t right, light leaks out the bottom or escapes at unfavorable angles, reducing brilliance and fire. The other parts play lesser roles in generating brightness and fire. The table mainly influences light entry and the face-up appearance, the girdle is just the outer edge, and the culet at the bottom can affect light leakage only if it’s unusually large, but it isn’t the primary driver of brilliance or dispersed color.

Brightness and fire come from how light is trapped and redirected inside the diamond. The pavilion—the lower portion beneath the girdle—faces and facets are arranged to catch light that enters through the crown and table and bounce it back up through the crown. When the pavilion angles and facet alignments are well proportioned, light is reflected efficiently and exits through the top, producing strong brightness and dispersion (fire). If the pavilion geometry isn’t right, light leaks out the bottom or escapes at unfavorable angles, reducing brilliance and fire.

The other parts play lesser roles in generating brightness and fire. The table mainly influences light entry and the face-up appearance, the girdle is just the outer edge, and the culet at the bottom can affect light leakage only if it’s unusually large, but it isn’t the primary driver of brilliance or dispersed color.