How to identify the authenticity of jadeite

For those of us who don't know much about jade, it is impossible to tell whether jade is real or fake. So at this time we need a professional appraisal institute to help. The Jade Appraisal Institute is a relatively fair place to identify jade. There are usually senior jade experts here to appraise the jade. After the appraisal is completed, a corresponding appraisal report will be issued. Many people may have this question: how does the appraisal institute identify the authenticity of jade? Is it just relying on the subjective judgment of experts?

In fact, experts at the appraisal institute also identify jadeite through the following steps.

1. The identification expert makes a preliminary judgment on the appearance of the jadeite, then weighs it, and then uses a fluorescent lamp to observe whether the jadeite fluoresces.

2. Use instruments to test. First, use a color filter to check the color of the jadeite. The natural color of jadeite will not change color. Then use an infrared spectrometer to measure the absorption spectrum of the jadeite. Natural jadeite has a specific absorption spectrum. This method can be used to quickly identify B-grade jadeite.

3. Use specific gravity liquid to measure the specific gravity. The specific gravity of jadeite is between 3.25 and 3.4. When natural jadeite is placed in specific gravity liquid with the same specific gravity, it will appear to be suspended. However, B-grade jadeite has a lighter specific gravity because it has more glue injected inside.

4. Use a spectroscope to measure the absorption spectrum of jadeite, and make a simple judgment based on the jadeite's absorption characteristics of light. In addition, the refractive index of jadeite can be measured using a refractometer based on the refraction principle. Since each gemstone has a unique refractive index, this method is very effective.

5. The last step is also the most detailed one, which is to use a microscope to observe the internal structure of the jade and judge the authenticity of the jade based on the internal structure.

In fact, if you are interested in jade identification, you can also try to identify it yourself. As long as you have the corresponding instruments, you can conduct your own research.