First, breathe into the diamond. Because of the good thermal conductivity of diamond, the fog can't stay on the surface of diamond for a long time after breathing, so what we see is that the fog disappears quickly. If it is an imitation, obvious fog can be seen on its surface, and it will take some time for the fog to disperse.

Second, draw a line on the surface of the diamond with an oily pen. Due to the lipophilicity of diamonds, the outdated oil strokes will leave clear and continuous lines. On the contrary, continuous lines cannot appear on the surface of the imitation.

Third, it takes advantage of the hydrophobicity of diamonds. A drop of water on the surface of a diamond can stay on the surface of the diamond for a long time, while a drop on the surface of an imitation will soon disperse.

Extended data:

Maintenance method of diamond ring:

1, clean regularly.

Diamond rings are all composed of bare diamonds and ring holders, and the technology adopted between them is prong setting, with some holes. Wearing it for a long time will make some dust and dirt exist between pores.

So after buying a diamond ring, everyone must clean it regularly and go to a professional flagship store to clean it. On the one hand, it is clean, on the other hand, it is relatively safe to prevent unnecessary damage to the diamond ring.

2. Avoid contact with cosmetics.

The ring holder of a diamond ring is generally platinum, although platinum will not oxidize like silver when worn for a long time. However, if you come into contact with chemical products during wearing, it will also cause oxidation. Therefore, it is recommended that you avoid contact with cosmetics when wearing a diamond ring.