Of the 4C's, cut is the one influenced by man. The other three are dictated by nature. When a diamond is cut to the proper proportions, all of the light entering from any direction is totally refracted out through the top and is dispersed into a display of sparkling flashes and rainbow colors, regardless of it's shape.
Ideal Cut
Light entering the diamond reflects internally from facet to facet and is refracted out through the top ONLY, creating maximum brilliance.
Cut Too Deep
When a diamond is cut too deeply, light escapes from the bottom, brilliance is lost and the center of the diamond will appear to be darker.
Cut Too Shallow
When a diamond is cut too shallow, light escapes from the bottom, brilliance is lost and the diamond appears watery, glassy and dark.
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