A fine diamond will have great cutting!
A fine cut or ”make” can make an enormous difference in the sparkle and brilliance of a diamond. Round diamonds usually have 58 facets and are called round brilliant cut diamonds. The crown facets diffuse light into “fire,” while the table width and other proportions determine the brilliance.
The cut is crucial to the quality of the diamond, because of its influence on the refraction of light entering the stone. Most of the light entering the top of the stone needs to be returned back in order for it to “sparkle.” If the stone is cut well it will return most of the light, revealing the brilliance and sparkle of the diamond.
A proportion grading table recommended by the IDC*
* International Diamond Center: For more information visit the link below.