Indian Gemological Identification

DIAMOND CUT.

One of the most defining characteristics of a diamonds is its cut. While high grades of color, clarity and carat weight also contribute to a diamond’s appeal, it’s the cut that determines the symmetry of the stone’s facets, its overall proportions, and its ability to reflect light. An expertly cut diamond will achieve high levels of brilliance, sparkle, and durability. Even if a diamond is graded well in other areas, a poor cut can result in a dull, muted effect.

LIGHT’S EFFECT ON A DIAMOND 

There are many factors that determine a diamond’s brilliance, the most important of which is its ability to reflect light. As a diamond is moved through a light source, tiny flashes will be visible within the stone. Commonly known as sparkle, This is also referred to as scintillation, an effect of the stone’s reflection and refraction of light.

1. REFLECTION 

When light enters the surface of a diamond, a portion of it is reflected back out of the top.

2. REFRACTION

The remaining rays of light travel into the center of the diamond and bounce off its internal walls, an effect known as refraction.

3. DISPERSION.

As light exits the diamond, dispersion causes the white light to be separated into multiple colors. Some light will escape out the bottom and sides, and some will reflect out of the top of the stone. The light that is reflected is referred to as the ‘fire’ of the diamond.

CUT DEFINITIONS

A diamond’s cut is an integral factor in determining its brilliance and fire. Even a flawless diamond will appear dull and muted if the cut is poor. When evaluating the cut of a diamond, there are some core characteristics that should be considered: