A diamond is beautiful
because of it's ability to perform a combination of three
physical effects with light. Brilliancy, scintillation
and fire.
Brilliancy is from the diamonds ability
to capture incident light, concentrate it, and return
back to the viewer making it appear brighter than anything
else around it.
Scintillation or sparkle, is from the
diamonds ability to twinkle and appear to be in motion
or alive. Motion of the viewer, the light source or the
diamond will make scintillation.
Fire is from the diamonds ability to
show bright flashes of spectral colors, (red, orange,
yellow, green, blue and violet) from the dispersion of
light as it leaves the diamond..
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