To ensure you have the most beautiful diamond possible, you may compromise on color, clarity or carat-weight but never compromise on cut.
In a diamond that is cut too deep, much of the light is reflected to opposite facets at the wrong angle and is lost through the sides. The diamond may appear black in the center.
A Lazare Diamond ensures optimal brilliance, scintillation, and fire. Light is reflected from facet to facet and comes back through the top in a rainbow blaze.
In a diamond that is cut too shallow, light is lost through the bottom because it is too flat; the result is a dull grey ring and a loss of brilliance.