There are many ways to tell whether a diamond is genuine or not: 1. Drip method: We can drop a drop of water on the diamond. If the water drops do not immediately disperse on the diamond, then this is a real diamond. 2. Oily drawing: Draw a line on the diamond with an oily pen such as a ballpoint pen or a gel pen. If the surface leaves a clear mark, it is a real diamond.

3. Fog test method: Because diamonds have extremely high thermal conductivity, we put a diamond in front of our mouth and breathe into it. If the diamond is not affected by water vapor, and the water vapor dissipates quickly, then the diamond is real. If the water vapor on the diamond has not dispersed for a long time, it may be a fake.

4. Refraction method: diamonds have high refractive index and high reflectivity, and the transparency of seeing through diamonds is very low. We put a diamond in the newspaper and read the words on the newspaper through the diamond. If you can clearly see the words or vague handwriting in the newspaper, then this diamond is basically fake. You can't see the words in the newspaper through real diamonds.

Diamond refers to polished diamond, which is a natural mineral and the original stone of diamond. Simply put, diamond is a simple crystal composed of carbon element formed under high pressure and high temperature conditions in the deep part of the earth.