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Chapter 1665 1638. Tasting the first black pearl

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    There were a total of 108 black pearls that Qin Shiou put in the box on his backpack. Each one was full, smooth and round. He handed the pearl box to Liv and was about to leave with Vincent to taste his delicious coffee.

    Vincent introduced: "Let me take you to the Jewelry Hall of Fame first. We have a lot of time now. Our experts need to appreciate and grade your black pearls, which will take a while."

    Qin Shiou asked: "If so, can I follow and take a look? I don't know how to grade black pearls yet."

    He didn¡¯t know the specific standards. Before, he was only graded according to size, roundness and brightness.  Now that he had the opportunity to study, he thought it would be good to study a little. He had to learn as long as he lived.

    After hearing his request, Vincent shrugged and said, "Of course, why not?"

    In this way, the two of them went to court and entered a large room marked with a sign saying "No entry without permission". Some people were already waiting inside. In the center was an X-ray machine that was the same as the one in the hospital.  The machine is bigger, with many optical lenses on it.

    In addition, similar to the laboratory, there are various reagents, glass tubes, triangular cups, and beakers placed on the table in the room. Qin Shiou only recognized one silver reagent, which was silver nitrate, and was unfamiliar with the others.

    Liv carefully placed the black pearls on the table, and immediately a girl wearing gloves came up and carefully placed each black pearl into a transparent glass stand with many grooves.

    It¡¯s not easy to do it. Qin Shiou watched from the side and felt that it might not be possible for him to do this job.  This glass holder was extremely transparent. If the black pearls hadn't been placed on it and the pearls were reflected in the glass, he would not have been able to see any grooves.

    Vincent introduced to Qin Shiou: "This is a panoramic light stand, used to distinguish whether the black pearls placed on it are natural black pearls, cultured pearls or imitation pearls. There are mainly these three kinds of black pearls in the world now."

    Qin Shiou nodded to express his understanding. Natural black pearls are wild black pearls, produced by wild black butterfly oysters. Most of them are produced in the atolls of Tahiti and French Polynesia.

    The most common black pearls on the market are brown to black seedless cultured pearls. China, Japan, and Australia are all developing this culture technology. The value of this kind of black pearls is lower than that of natural black pearls.  However, as cultured seedless pearls come in more and more colors, their value is still good.

    The cheapest is imitation pearls made of black shells. There are two production methods. The first is to cover the surface of the core with a layer of black essence-de-orient film. The second is to make  Made of black shell that is bead-shaped and polished to give it a pearly luster.

    Vincent said: "Look, the first step of identification has begun."

    As soon as he finished speaking, the lights in the sealed room suddenly went out, and then the glass bracket itself emitted a soft white light.

    The light emitted by the glass frame surrounds the black pearl in all directions. No wonder it is called the ¡®panoramic light frame¡¯.  At this time, the black pearl itself emits other colors besides black, which is a fragrant bright purple. The white light is on the outermost layer, and the black halo wraps the bright purple inside. The glass frame is now completely invisible, as if  There are more than a hundred round black pearls emitting black, purple and white light floating in the air, and the visual impact is super strong.

    Vincent pointed to these black pearls and said: "The main thing now is to identify whether these black pearls are imitations. This depends on the luster of the coated pearls. The pearlescent luster of imitation pearls comes from underneath the thin layer of polymer, while natural pearls have not been coated.  It has been processed, so the pearlescent light comes from the outermost layer of the pearl. You can observe the abnormal reflection of color on the top side of the pearl. Due to astigmatism, the top of the imitation pearl also has purple but it is very loose, while their sides will have a green tint or pink.  Tune and the like.¡±

    The glass shelf is slowly rotating and tumbling, allowing the black pearl to be displayed in front of everyone in all directions.  After rotating for about five minutes, numbers suddenly appeared below the black pearl. This was to label the black pearl.

    After the numbers appeared, the lights turned back on, and the light on the glass shelf dimmed, returning to its previous appearance.

    A middle-aged man wearing glasses as precise as a clock repairman nodded to Vincent, signed a piece of paper and said: "No problem, Mr. President, there are no imitation pearls in this."

    Vincent also nodded and motioned for them to continue the appraisal. He said to Qin Shiou: "Actually, this process is just for safety reasons. High-quality natural black pearls and imitation pearls can also be distinguished with the naked eye. No matter what technology is used, imitation pearls can be distinguished with the naked eye."  Pearls will not have the smoothness of natural pearls that have been carved over time. To the touch, natural pearls also have a slight viscosity, as if??I want to be with you.  "

    Qin Shiou felt this. When he harvested black pearls for the first time, they felt a little sticky when he held them in his hands. He rubbed them with deerskin several times and they were still like this. At that time, he thought it was because his palms were sweaty.

    With the possibility of imitation pearls eliminated, the next step is to determine whether the pearl is wild or cultured.

    The wild black pearls and cultured black pearls here do not refer to whether the pearls are artificially cultured. Qin Shiou here can also be regarded as black pearls produced by artificially cultured black butterfly oysters, but these are called wild black pearls and cultured black pearls.  It is to perform some processing after the pearl is produced to make its color and texture better-looking.

    Such black pearls are also real pearls, which are different from imitation pearls. However, because their color and luster are artificially processed after all, they are not grown naturally. Therefore, the color will change and the luster will fade over time, which is natural.  The value is lower.

    Nowadays, imitation pearls and natural black pearls are relatively rare. The latter is produced in small quantities, while the former is easy to distinguish. There may be many idiots in the world, but there are still relatively few idiots who can reach the level of high-end jewelry consumption.

    ¡°Cultivated pearls are the most popular in our industry now. In fact, these are also fakes!¡± Vincent said. ¡°This kind of pearls can also be introduced on the certificate as real pearls. They are indeed cultured with seawater and shellfish.  But they will cover up the fact that these beads have been processed and dyed, just like some small stores selling jade will not tell customers whether the jade is optimized B or C goods, in the end it is the customers who are fooled."

    Qin Shiou nodded. Cultured black pearls are legal in the United States and Canada due to their ornamental value and demand.  However, in territories where natural black pearls are produced, such as Tahiti and French Polynesia, such black pearl production methods are illegal.  (Remember the website address: www.hlnovel.com
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