Chapter 1665

Qin Shiou put 108 black pearls in the box of his backpack, all full, smooth and round. He handed the Pearl box to liv and was ready to leave with Vincent to taste his delicious coffee.

Vincent said, "let me take you to the jewelry Hall of fame. 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 so, can I follow it? I don't know how to grade black pearls. "

He didn't know the specific standard. Before, he only graded it according to size, roundness and brightness. Now he has the opportunity to learn. He thinks it's good to learn. It's never too old to eat and learn.

At his request, Vincent shrugged and said, "of course, why not?"

In this way, they went to court and entered a large room marked "no entry without permission". There are already some people waiting in it. In the most central position, there is a machine like the hospital X-ray fluoroscope, but it should be larger. There are many optical lenses on it.

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

Liv carefully put the black pearl on the table. Immediately, a girl wearing gloves came up and carefully put each black pearl on a transparent glass support with many grooves.

It's not easy to do it. Qin Shiou looked at it and thought it might not be possible for him to do this job. The transparency of this glass support is particularly high. If the black pearl is not placed and the pearl is reflected in the glass, he must not see where there is a groove.

Vincent introduced to Qin Shiou: "this is a panoramic light frame, which is used to distinguish whether the placed black pearls are natural black pearls, cultured pearls or imitation pearls. Now there are mainly these three kinds of black pearls in the world."

Qin Shiou nodded to understand that natural black pearls are wild black pearls, which are produced by wild black butterfly shells, most of which are produced in Tahiti and French Polynesia atoll waters.

At present, the most black pearls on the market are brown to black seedless cultured pearls. China, Japan and Australia are developing breeding technology in this regard. The value of this black pearl is lower than that of natural black pearls. However, due to the growing variety of colors of cultured seedless pearls, their value is OK.

The cheapest is the imitation pearl made of black shell. It has two production methods. The first is made by covering the surface of the ball core with a layer of black essence de oriented film, and the second is made of pearl shaped black shell with pearl luster after polishing.

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

As soon as he spoke, the light in the closed room suddenly went out, and then the glass support itself emitted 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 in addition to black. It is a kind of fragrant bright purple. The white light is in the outermost layer, and the black halo is wrapped in bright purple. Now the glass frame is completely invisible. It seems that more than 100 round black pearls emitting black, purple and white light are floating in the air, with super strong visual impact.

Vincent pointed to the black pearls and said, "now it is mainly to identify whether these black pearls are imitations. It depends on the luster of the coated pearls. The pearls of the imitated pearls come from under the thin layer of polymer, while the natural pearls come from the top layer of the pearls because they have not been treated. You observe the abnormal reflection of the color on the side of the top of the Pearl. Because of astigmatism, the top of the imitation pearl is also purple but very loose, and their sides will be green or pink. "

The glass frame is slowly turning and tumbling, so that the black pearl can be displayed in front of everyone in an all-round way. After rotating for about five minutes, a number suddenly appeared under the black pearl, which is the labeling of the black pearl.

After the number appeared, the light came on again, and the light of the glass frame dimmed down and returned to its previous appearance.

A middle-aged man with precision glasses like a clock nodded at Vincent's characteristics, signed his name on a piece of paper and said, "no problem, Mr. President, there are no imitation pearls in it."

Vincent also nodded and motioned them to continue the identification. He said to Qin Shiou: "in fact, this process is just for the sake of insurance. High quality natural black pearls and imitation pearls can also 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, natural pearls also have a slight viscosity, as if they want to be combined with you. "

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

The possibility of imitating pearls has been removed. Next, the most difficult point is to distinguish whether the pearls are wild or cultured.

The wild black pearls and cultured black pearls here don't mean whether the pearls are artificially cultured or not. Qin Shiou here is also the black pearls produced by artificially cultured Black Butterfly shells, but this is called wild black pearls. Cultured black pearls refer to some treatment after the production of pearls to make them look better and have better texture.

Such black pearls are also real pearls, which are different from imitation pearls. However, because their color and light are processed manually and not grown naturally, the color will change and the light will fade over time, so the natural value is low.

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

"Now the most in our industry is breeding pearls. In fact, this is also a fake!" Vincent said, "this kind of pearl can also be introduced in the certificate that it is a real pearl. It is indeed cultured with seawater and shellfish, but they will cover up the fact that these beads are processed and dyed. Just like some small stores selling jadeite do not tell customers whether the jadeite is optimized B and C goods, it is the customers who are ultimately deceived."

Qin Shiou nodded. It is legal to cultivate black pearls in the United States and Canada because of their ornamental and demand. However, in natural black pearl producing areas such as Tahiti and French Polynesia, such black pearl production methods are illegal.