Which term refers to the flashes of light and the contrasting dark areas you see when the diamond, the light, or the observer moves?

Which term refers to the flashes of light and the contrasting dark areas you see when the diamond, the light, or the observer moves?

• A. Scratch
• B. Scintillation
• C. Selective Absorption
• D. Sawing

Answer: (B)

Scintillation is the changing flashes of light and the dark patches you see as a diamond, the light source, or your position moves. This happens because light is bouncing around inside the diamond's cut facets, and small changes in angle alter which facets reflect light toward your eye. When you shift the diamond or move relative to the light, those reflections shift, creating bright sparkles at some angles and darker areas at others. That pattern of alternating light and dark is precisely scintillation. It’s different from a scratch (physical damage), selective absorption (color tint from wavelengths absorbed), or sawing (a manufacturing step).

Scintillation is the changing flashes of light and the dark patches you see as a diamond, the light source, or your position moves. This happens because light is bouncing around inside the diamond's cut facets, and small changes in angle alter which facets reflect light toward your eye. When you shift the diamond or move relative to the light, those reflections shift, creating bright sparkles at some angles and darker areas at others. That pattern of alternating light and dark is precisely scintillation. It’s different from a scratch (physical damage), selective absorption (color tint from wavelengths absorbed), or sawing (a manufacturing step).