When a diamond is cut to precise proportions, light is reflected from one facet to another and dispersed through the crown of a stone. If the cut of a diamond is too deep, some light escapes through the opposite side of the gemstone. If it is cut too shallow, light again escapes before it can be reflected. Only the worlds most skilled cutters can successfully unleash a diamonds rare fire.

The cut of a diamond, its shape, its depth and width, the uniformity of the facets, all determine
a diamond's brilliance. We consider cut to be the most important diamond characteristic because
even if a diamond has perfect color and clarity, a diamond with a poor cut will have dulled brilliance.

Round Brilliant Shines 100%

Oval Shines 10% Less

Princess Shines 18% Less

Pear Shines 20% Less

Marquise / Navette Shines 25% Less

Emerald Shines 60% Less

Polish and symmetry are two important aspects of the cutting process. The polish grade describes the smoothness of the diamonds facets, and the symmetry grade refers to alignment of the facets. With poor polish, the surface of the facet can be dulled, and may create blurred or dulled sparkle. With poor symmetry, light can be misdirected as it enters and exits the diamond. The polish and symmetry grades can be as important as the clarity and color grades.