1, Mohs hardness is 10, which is the highest hardness known in nature today;

2. Good thermal conductivity;

3. Oil repellency and hydrophilicity;

4. High refractive index.

Cutting has a very important influence on the quality of diamonds, and cutting is the only "4c" that can be artificially influenced. Only when the diamonds with reasonable proportions and identical sections are refracted can they be concentrated, so as to present gorgeous fire colors and perfectly reflect the natural beauty of diamonds. And diamonds with poor cutting will make the light refract and diverge, making the diamonds look dull. Therefore, cutting has an important influence on the quality of diamonds. According to international practice, cutting can affect the diamond price by up to 40%.