Chapter 71: The First Place of Treasure

After returning, he took a hot shower, swallowed a few cold medicines and rested for a while, and there was no illness or disaster. Tang Han continued to live a life of life. The next day, Tang Han went to the gym and sweated heavily. Fortunately, he went there late and didn't meet Ye Xin, otherwise she would have been asked again.

After two classes on Thursday morning, Tang Han hummed a small song softly, stepped on his bicycle, and headed to the testing center of the Baoyu Association on Jianghuai Road. This place is not far from Bihai University. In a dozen minutes' drive, Tang Han arrived downstairs of the testing center.

Tang Han was still a little unsure when he went to the meeting alone, just because Qin Yue was not around the encyclopedia. He could only remember the most important categories of the professional knowledge of gems and jade. If he really wanted to identify jewelry, jade would naturally be easy to pick up. However, Tang Han felt a little guilty if he had never been exposed to other things like diamonds, red and sapphires.

Anyway, I went to study first, why do I want so much? Tang Han quickly cheered himself up and went to the jade inspection center on the third floor. There were still a few people waiting outside. It seemed that he wanted to get the identification result as soon as possible.

A woman in her forties received him at the front desk. She initially thought that Tang Han used jewelry to identify him. The gem and jade testing center here provides a fee for jewelry and jade identification and issues an appraisal certificate, which charges fifty yuan for each appraisal.

After Tang Han explained that he was recommended by Yuan Fengliang, who was in charge of jewelry appraisal in the association, to study, the woman smiled and took Tang Han to meet Liu Weidong, the head of the testing center.

The JAC Testing Center is not big. Apart from the front desk outside, there are only a few testing rooms, also called laboratory rooms. The instruments inside are very advanced and complete. Tang Hanpiao’s astronomy has seen gem refractometers, gem microscopes, gem polarizers, gem spectrometers, infrared spectrometers, etc., which are all available here.

Liu Weidong is in his sixties, with a rosy complexion and a very good spirit. When Tang Han saw him, he was in the testing room of the testing center, testing a piece of jade Buddha in front of a gem spectrometer.

Looking back, Liu Weidong, who put down the jade in his hand, looked kind. A few days ago, he also received a call from Mr. Zhuo and Yuan Fengliang, saying that a young junior came to them to study and asked him to help take care of him. When he spoke to him, Liu Weidong naturally nodded in agreement. Now he saw that although he looked ordinary, his eyes were extremely bright. He tried to look at him for a while. Liu Weidong felt extremely clear and had a faint feeling of being seen through.

Liu Weidong has been engaged in the jewelry appraisal industry for many years and has received personal guidance from many masters who have been engaged in the jewelry appraisal industry before liberation. He is the most authoritative appraiser in this JAC Jade Testing Center.

"Xiao Tang is right! I'll take you around first and get familiar with the usage of these instruments!" With the recommendations of Mr. Zhuo and Yuan Fengliang, Liu Weidong seemed particularly enthusiastic.

Tang Han quickly refused, "No need, you guys are busy, I'll just watch it."

"Don't be so polite. If you want to learn, you have to be familiar with the operation and uses of these instruments first!" Liu Weidong was a rare enthusiastic reply. After Tang Han thanked him, he followed him.

"Xiao Tang, you have studied at President Zhuo's Jade Shop for a while!"

"The detection methods and methods of our gem and jade testing center are different from those of jadeite. Take jadeite for example! In jadeite, you can determine whether it is genuine based on experience and simple instruments such as magnifying glass. But here, in addition to a simple judgment like in jadeite, you must also detect the parameters of this jadeite, and you can point it to what you can understand!"

"Well, this will make people more at ease. By comparing the parameters of real jade, it is clear at a glance whether it is true or false, and it is more convincing." Tang Han nodded and said.

"Our general process is like this. First, take photos and register. Each piece of jewelry delivered has to go through this step. I won't say what it does!"

Of course, Tang Han knew that so many jewelry sent for inspection must be registered and numbered to avoid being confused or taken advantage of the opportunity to get rid of the bag. The jewelry appraisal industry is very small and there are not many people. Once there is any fraud or theft, everyone will know it immediately, and he will never be able to make ends meet in this circle.

"Then we are weighing, measuring the specific gravity of the jewelry. Many fakes will show their original shape at this step; then, we observe with the naked eye and a magnifying glass, and this step can also determine the authenticity of many jewelry. Then, with the help of various instruments, we are equipped with advanced instruments such as infrared spectrometers, gem microscopes, spectrometers, etc., through which we observe the waveform diagram of the gems, the color after spectroscopy, etc., and I will introduce these instruments to you one by one." Liu Weidong stopped, took a breath, and looked at Tang Han and listened seriously.

"Also, our colleagues in the entire testing center have to pass on every piece of jewelry. Finally, the system summarizes the parameters and indicators of this jewelry, determines the test results, and issues an appraisal certificate." Liu Weidong said in a leisurely manner. After working in this industry for so long, he has been remembering these processes.

Then, Liu Weidong took Tang Han to visit. He first introduced Tang Han to his colleagues who worked in front of these different instruments. There were more than 20 people in the testing center, including middle-aged and elderly people in their twenties and thirties, and half of them were among the young people. There were also a few women among the young people, and the elderly were basically men.

Then, Liu Weidong introduced to Tang Han the operation method and specific uses of each instrument.

Tang Han also observed the style of these colleagues in testing jewelry. In order not to affect their work, Tang Han did not observe it himself.

What makes Liu Weidong most proud is that their testing center is equipped with an infrared spectrometer, which is worth a lot of 150,000 yuan per unit. It can quickly and accurately detect bleached and filled jade based on the characteristics of the infrared absorption spectrum of gemstone, through strong absorption peaks. Although this is not very useful in Tang Han's opinion, Liu Weidong was very excited when he talked about it. Such equipment must be equipped by every testing center.

After following Liu Weidong, it was almost time to have lunch break. The male and female inspectors in the testing center went to have a meal. In this industry, eye rest and body rest were particularly important. Liu Weidong mentioned just now that the jewelry that everyone looks at about four or five hundred pieces of jewelry every day is a very physically exhausting thing.
Chapter completed!