Every object has its inherent characteristics, including physical and chemical characteristics. Because diamonds are extremely precious, it is suitable to identify true and false by their physical characteristics.

Among them, the easiest way is to zoom in and observe, using an electronic magnifying glass.

Method 1:

Specific gravity test method

There is a specific gravity liquid on the market, which is used to measure the specific gravity of precious stones. We can use a liquid with a specific gravity of 3.32 to test the authenticity of diamonds. The specific gravity of natural diamonds is 3.52, and all natural diamonds will sink when placed in specific gravity water, so any gem floating on specific gravity liquid can be sure not to be a diamond.

Method 2:

The hardness of real diamonds is extremely high, which is 10. You can observe the waist of the diamond. If the waist is frosted, this method is most suitable. Because diamond is harder than any imitation, there will be no fine lines like imitation, and the waist of diamond is granular.

Method 3:

Because the unit cell of a diamond is a five-atom tetrahedron, its crystal structure can be regarded as a three-dimensional arrangement of tetrahedron combinations, regular repetitions and corners. Diamonds composed of tetrahedrons, such as cubic, octahedral and rhombic dodecahedron crystals, have a smooth surface like a mirror, without smooth textures or grooves. Those with smooth texture or grooves are imitations.

The surface of the fake drill is polished smoothly.

Atomic structure of diamond

Method 4:

hardness testing

Diamond is the hardest natural substance known, and nothing can mark it. If you can mark it, it's definitely not a diamond.

Method 5:

Thermal conductivity test

At the same time, breathe into the diamonds and other similar objects to be debated. If it is a diamond, the water mist condensed on its surface should evaporate faster than other objects, because the thermal conductivity of the diamond is high.

Method 6:

Hydrophilic method

Diamonds have an "oil absorption" effect on oil, while fake diamonds do not. Rub the diamond with a little oil on your face and rub it with your thumb, which will feel sticky and not easy to slip, while the fake diamond will make your thumb feel very slippery.