Diamond And Diamond Grading Practice Exam

Spotlighting focuses a bright, narrow beam of light into the diamond, making dispersion highly visible. The feature you’re looking for is fire—the rainbow-colored flashes that appear when light is split into its spectral colors by the gem’s facets. By directing a concentrated light source, you maximize these colored flashes around the edges of the stone, which is how you judge how strongly a diamond exhibits fire. Brightness, on the other hand, refers to how much light the diamond returns to the eye and is better judged under different lighting conditions that emphasize overall light return. Color relates to any natural body tint in the diamond, not to the spectral dispersion you see as fire. Clarity concerns internal inclusions and blemishes and isn’t about color dispersion either. So spotlighting is most about evaluating fire.