How a Diamond Handles Light
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It is the cut that enables a diamond to make the best
use of light. When a diamond is cut to good proportions (1), light is
internally reflected from one facet to another and then dispersed through
the crown or the top of the stone.
If the cut of the diamond is too deep, (2) some light
escapes through the opposite side of the pavilion or bottom.
If the cut is too shallow (3 ), light escapes through-out
the pavilion or bottom before it can be reflected.
Of all the 4C's, cut is the one most directly influenced
by humans. The other three are dictated by nature. The cut or make of
a diamond will dramatically influence its fire and sparkle, for it is
the polisher's skill that releases its beauty.
 
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