Which term describes the dispersion of light into spectral colors in a diamond?

Which term describes the dispersion of light into spectral colors in a diamond?

• A. Brightness
• B. Fire
• C. Luster
• D. Clarity

Answer: (B)

Dispersion of light into spectral colors in a diamond is called fire. When white light enters a diamond, it refracts and splits into different colors because diamonds have high dispersion—the ability to bend wavelengths by different amounts. This separation creates the colorful flashes you see as the stone is moved, distinct from the overall brightness (the amount of white light returned), luster (surface shine), or clarity (freedom from internal flaws). A well-cut diamond enhances fire by directing light through facets to maximize the visible spectrum, producing those vibrant color flashes that define this phenomenon.

Dispersion of light into spectral colors in a diamond is called fire. When white light enters a diamond, it refracts and splits into different colors because diamonds have high dispersion—the ability to bend wavelengths by different amounts. This separation creates the colorful flashes you see as the stone is moved, distinct from the overall brightness (the amount of white light returned), luster (surface shine), or clarity (freedom from internal flaws). A well-cut diamond enhances fire by directing light through facets to maximize the visible spectrum, producing those vibrant color flashes that define this phenomenon.