The physical property of light that causes Fire in a diamond. This refers to the separation of white light into the all the colors of the spectrum, and gives the little flashes of color as you move the diamond or the light source.

One of the three main considerations when judging the overall Light Performance in a diamond: Dispersion, Scintillation, and Brilliance.

Here are some diamonds in my lab, showing flashes of fire.

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WP Glossary Term Usage