Diamond - Cut - Polish

Learn about diamondsPolishing (Polish)

Polishing refers to the overall smoothness of a diamond's surface. It is usually the result of the polishing process performed by the cutter, a process that cuts the surface of the diamond flat and brings it to a high level of surface smoothness. This process is usually performed at the final stage of diamond cutting and polishing.

When cutting and polishing a diamond, the polishing wheel may drag tiny dislodged crystals across the diamond's surface, thus creating tiny defects. Depending on the severity, these defects may disrupt the refraction of light as it enters and leaves the diamond.

During the polishing process, the cutter uses abrasive tools and special grinding wheels to smooth out the surface of the diamond, eliminating surface imperfections and abrasions, and ultimately achieving a highly smooth surface. This allows the diamond to reflect light better, revealing a brighter shine and sparkle.

The quality of the polish will directly affect the appearance and value of the diamond. A high quality diamond should have a smooth, flat surface with no visible flaws or abrasions. This allows the light to pass through the diamond better, resulting in more brilliance and sparkle.

When purchasing a diamond, consumers should pay attention to the polished quality of the diamond. Generally speaking, the higher the polish quality, the higher the value of the diamond. Therefore, when purchasing a diamond, consumers are advised to choose a diamond with high polish quality to ensure its value and quality.

 The polished features of a diamond are located on the surface of the diamond, while the flaws inside the diamond are classified as inclusions in the "clarity" category of the 4Cs.

A diamond with the "Excellent" grade has a very smooth surface that allows light to enter in the most efficient way.

GIA will have five grades, the highest being Excellent (EX), followed by Very good (VG), Good (G), Fair (F), and the worst being Poor (P).