Diamond cutting 3ex refers to the diamond's cutting ratio, polishing, and symmetry reaching the ex level. 3ex cut, also known as perfect cut or ideal cut, represents the highest cutting grade in the GIA standard. Only 3% of top-quality diamonds can meet this standard. Diamonds with 3ex cut can exhibit strong brightness, flicker, and fire color.
The meaning of diamond cutting 3EX
The cutting, polishing, and symmetry of diamonds are divided into five levels, from high to low: ex (Excellent ideal cutting), vg (Very good), g (Good good), f (Fair average), and p (Poor poor).
1. EX ratio
Diamonds with standard cutting ratios undergo precise calculations at every angle, resulting in perfect refraction of light entering the diamond and presenting a dazzling and charming fiery effect.
2. EX polishing
Polishing demonstrates the smoothness of the diamond surface. Diamonds with low flatness can affect the direction of light reflection and refraction on the surface of the diamond, thereby affecting the color of the diamond.
3. EX symmetry
Symmetry reflects whether there are any offset or tilt issues in the arrangement of various facets of a diamond. If the symmetry of a diamond is low, it will cause a shift in the reflected and refracted light of the diamond, thereby affecting the fire effect of the diamond.