Golden Fishery

  Qin Shiou put a total of 108 black pearls in the box of his backpack, all of which were full and smooth. He gave the pearl box to Liv, ready to leave with Vincent to taste his delicious coffee.

   Vincent introduced: "I will take you to the Jewelry Hall of Fame first. Now we have a lot of time. Our experts need to grade your black pearls. It will take a while."

  Qin Shiou asked, “If so, can I follow along? I don’t know how to classify black pearls.”

  He doesn’t know the specific criteria. Before, he only graded them according to size, roundness and brightness. Now that he has the opportunity to learn, he thinks it’s not bad to learn a little bit. You have to learn when you live and eat.

   Hearing his request, Vincent shrugged and said: "Of course, why not?"

In this way, the two of them went through the court and entered a large room marked with a sign of "No entry allowed without permission". Some people were already waiting in it. There was a X-ray fluoroscope at the center of the room. The machine is bigger, but it has a lot of optical lenses on it.

  In addition, similar to a laboratory, various reagents, glass tubes, triangular cups, and beakers are placed on the table in the room. Qin Shiou only recognized one silver reagent as silver nitrate, and was not familiar with the others.

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

  It’s not easy. Qin Shiou looked at it and felt that it might not be possible for him to do this job. The transparency of this glass holder is very high, if it is not put on the black pearl. The pearl is faint in the glass, so he must not see where there are grooves.

  Vincent introduced to Qin Shiou: “This is a panoramic light stand, used to distinguish whether the black pearls put on it are natural black pearls, cultured pearls or imitation pearls. Now the world's black pearls are mainly these three types."

  Qin Shiou nodded to express understanding. Natural black pearls are wild black pearls, which are produced by wild black butterfly shells, most of which are produced in the waters of the atolls of Tahiti and French Polynesia.

  The most black pearls on the market now are brown to black seedless cultured pearls. China, Japan, and Australia are all developing this cultivation technology. The value of this black pearl is lower than that of natural black pearl. However, because the variety of seedless pearls cultivated is increasing, the value is not bad.

The cheapest is the imitation pearl made of black shells. There are two production methods. The first is made by covering the surface of the core with a layer of black dyed essence-de-orient film, and the second is made by making It is made of pearl-shaped black shells with pearly luster after being polished.

  Vincent said: "Okay, the first step of discrimination has begun."

  As soon as his voice fell, the lights in the airtight room suddenly went out. Then the glass holder itself emits a soft white light.

  The light emitted by the glass frame surrounds the black pearl in all aspects, no wonder it is called the ‘panoramic light frame’. At this time, the black pearl itself emits other colors besides black. It is a rich bright purple. The white light is on the outermost layer, and the inside is black halo wrapped in bright purple. The glass frame is completely invisible now, it seems There are more than one hundred perfectly round black pearls with black, purple and white light floating in the air. The visual impact is super strong.

Vincent pointed to these black pearls and said: "Now the main purpose is to identify whether these black pearls are imitations. This depends on the luster of the coated pearls. After treatment, the pearl light comes from the outermost layer of the pearl. You can observe the abnormal reflection of the color on the top side of the pearl. Because of the astigmatism, the top of the imitation pearl is also purple but loose, and their sides will have green or pink Tune and so on."

  The glass frame is slowly turning and tossing, allowing the black pearl to be displayed in front of everyone in all directions. After rotating for about five minutes, numbers suddenly appeared under the black pearl. This is to label black pearls.

  After the number appears. The lights came back on, and the light of the glass frame dimmed, returning to its previous appearance.

  A middle-aged man with precision glasses like repairing clocks nodded to Vincent, and signed on a piece of paper: "No problem. Mr. President, there are no imitation pearls in it."

  Vincent also nodded. Instructing them to continue the identification, he said to Qin Shiou: "In fact, this process is just to be on the safe side. High-quality natural black pearls and imitation pearls can be distinguished with the naked eye. No matter what technique is used, imitation pearls will not have natural pearls. That kind of smoothness carved out by time. To the touch, natural pearls also have a slight viscosity, as if it wants to be combined with you."

  Qin Shiou felt about this. When he harvested black pearls for the first time, he felt that they were a bit sticky in his hand. He wiped it with deerskin a few times and it was still like this. At the time, he thought it was because of sweaty palms.

  The possibility of imitation pearls has been eliminated. The next thing is the most difficult point, which is to distinguish whether the pearl is wild or cultivated.

The wild black pearls and cultured black pearls here are not about whether the pearls were cultivated artificially. Qin Shiou here can be regarded as black pearls produced by artificially cultivated black butterfly shells, but this is called wild black pearls, which refers to cultured black pearls. Some treatments are performed after the pearl is produced to make it look better and have a better texture.

Such black pearls are also real pearls, not the same as imitation pearls, but because their color and brilliance are artificially processed after all, they are not formed by natural growth. Therefore, the color and brilliance will change over time, and the light will recede, which is so natural. The value is low.

  Imitated pearls, like natural black pearls, are relatively rare now. The latter is less produced, and the former is easy to be distinguished. There may be many fools in the world, and there are still relatively few fools who may reach the consumption level of high-end jewelry.

"Now the most in our industry is cultured pearls, in fact, this is also a fake!" Vincent said, "This kind of pearl can also be stated on the certificate that it is a real pearl, and it is indeed cultivated with sea water and shellfish. They come out, but they will cover up the processing and dyeing of these beads, just like some small shops selling jade will not tell customers whether the jade is an optimized B or C product. In the end, it is the customer who is fooled."

  Qin Shiou nodded, cultivating black pearls is legal in the United States and Canada because of the ornamental nature and demand. However, in territories where natural black pearls are produced, such as Tahiti and French Polynesia, this method of producing black pearls is illegal. (To be continued~^~)