There were 1 black pearl in the box of Qin Shiou's backpack. They were all full and smooth and round. He handed the pearl box to Liv and prepared to follow Vincent to taste his delicious coffee.

Vincent introduced: "I'll take you to the Jewelry Hall of Fame first. Now we have a lot of time. Our experts need to appreciate and grade your black pearls, which takes a little time."

Qin Shiou asked, "If this is the case, can I follow and take a look? I don't know how to grade the black pearls."

He didn't know the specific standards. He used to be graded based on size, roundness and brightness. Now that he has the opportunity to learn, he thinks it's good to learn, and he has to learn until he's old.

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

In this way, the two of them appeared in court and entered a large room marked "No entry without permission". Some people were waiting for them. There was a machine like the hospital's X-ray fluoroscopy device in the center, but it was bigger, with many optical lenses on it.

In addition, similar to the laboratory, there are various reagents, glass tubes, triangle cups, and beakers on the table in the room. Qin Shiou only recognizes that one silver reagent is silver nitrate, and he is not familiar with anything else.

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

It's not easy to do it. Qin Shiou looked at it, thinking that it might not be possible to let him do this job. The glass bracket has a very high transparency. If it weren't for the black pearls that were reflected in the glass after putting on them, he would definitely not be able to see where there were grooves.

Vincent told Qin Shiou: "This is a panoramic light stand, used to distinguish whether the black pearls placed on them are natural black pearls, and whether they are breeding pearls or imitation pearls. Now these three are the main types of black pearls in the world."

Qin Shiou nodded to show that he understood that natural black pearls are wild black pearls, produced by wild black butterfly shells, and most of them are produced in the waters of circular coral reefs in Tahitian and French Polynesia.

The most black pearls on the market now are brown to black nucleated cultured pearls. China, Japan, and Australia are developing breeding technology in this area. This black pearl is less valuable than natural black pearls. However, because the color types of cultivated nucleated pearls are increasing, they are of good value.

The cheapest one is imitation pearls made of black shells. There are two production methods. The first is to coat the surface of the ball core with a black colored ne-de-o film, and the second is to be made of black shells made of beads and polished with pearl luster.

Vincent said: "I'm optimistic, the first step of distinguishing has begun."

As soon as he finished speaking, the light in the closed room suddenly went out. Then the glass bracket itself emitted a soft white light.

The light emitted by the glass stand envelops the black pearl in all aspects, no wonder it is called the "panoramic light stand". At this time, the black pearl itself also emits other colors besides black black light, which is a rich bright purple color. The white light is on the outermost layer, and the inside is covered with a black halo. The glass stand is now completely unavailable. It seems that more than a hundred round black pearls emitting the three-color black purple and white light floating in the air, with super strong vision impact.

Vincent pointed to these black pearls and said, "Now it is mainly to identify whether these black pearls are imitations. This depends on the luster of the coated pearls. The pearlescent light of the imitation pearl comes from the bottom of the thin layer of the polymer. Because natural pearls have not been treated, the pearlescent light comes from the top of the pearl. You can observe the abnormal reflection of the color on the top of the pearl. Because of astigmatism, the top of the imitation pearls also has purple but very loose, and their sides will have green or pink tones."

The glass stand was slowly turning and churning, allowing the black pearl to be displayed in all directions in front of everyone. After about five minutes of rotation, numbers suddenly appeared below the black pearl, which was the labeling of the black pearl.

After the numbers appear, the lights light up again, and the light of the glass stand dimmed, returning to its previous appearance.

A middle-aged man with precision glasses like clockwork nodded to Vinson's character and signed on a piece of paper: "No problem, Mr. President, there are no imitation pearls here."

Vincent also nodded and signaled them to continue the identification. He said to Qin Shiou: "In fact, this process is just for the sake of safety. High-quality natural black pearls and imitation pearls can be distinguished with the naked eye. No matter what technology is used, imitation pearls will not have the smoothness of natural pearls carved with time. To the touch, the natural pearls also have a little viscosity, as if they want to combine with you."

Qin Shiou was touched by this. When he first harvested the black pearls, he felt that they were a little sticky when he held them in his hand. He rubbed them with deer skin several times and still did this. At that time, he thought it was because of sweating in his palms.

The possibility of imitating pearls is eliminated, and the next step is the most difficult point, to distinguish whether the pearl is wild or farmed.

The wild black pearls and breeding black pearls here are not whether the pearls were artificially bred. Qin Shiou is also considered black pearls produced by artificially bred black butterfly shells, but this is called wild black pearls. Breeding black pearls refer to some treatment after the pearl is produced to make it look better in color and have a better texture.

Such black pearls are also real pearls, which are different from imitation pearls. However, because their color and light are processed manually after all, they do not grow naturally. Therefore, over time, the color will change and the light will retreat, so that their natural value will be low.

Nowadays, imitation pearls are relatively rare, just like natural black pearls, the latter produces less, while the former is easy to be distinguished. There may be many idiots in the world, and there may be relatively few idiots who have reached the consumption level of high-end jewelry.

"The most common pearls in our industry are breeding, and in fact they are also fakes!" Vincent said. "This kind of pearl can also be introduced on the certificate that this is a real pearl. It is indeed a breeding of seawater and shellfish, but they will cover up the fact that these beads have been processed and dyed. Just like some small shops will not tell customers whether the jade is optimized for B and C products, the customer will be the one who is deceived."

Qin Shiou nodded. Because of the ornamentality and demand, it is legal in the United States and Canada. However, in areas where natural black pearls are produced, such as Tahiti and French Polynesia, such black pearl production methods are illegal. (To be continued.)
Chapter completed!