since the opening of the pearl website in 212, the pearl certificate has entered the stage of online inquiry. This year, the National Pearl Center once again introduced domestic advanced technology, developed and applied the software "Pearl and its products identification data management system", and added a QR code to the pearl identification certificate. When the pearl products are sent for inspection, a unique certificate number, inspection number and check code are generated according to the law. The system stores these codes and inspection information of pearls in the unique two-dimensional code identification of samples. Consumers can jump to the page where inspection information is stored by scanning the two-dimensional code on the certificate with their smart phones, inquire about the identification information of the products corresponding to the current certificate, and get accurate information on the quality, size, color, shape and other aspects of pearl products. According to this information, consumers can completely judge the authenticity, value and other information of pearls.

Ask about the pearl appraisal certificate

I also bought pearls on Taobao. Personally, I think that if you buy valuables online, don't be superstitious about certificates. It's best to know what to buy first, including how to tell the difference between good and bad.

A simple understanding is to search for similar products on the Internet first, and then look at similar things in physical stores. Don't start blindly.

Then, it's a cliche. It's best for the seller's reputation to take the trouble to read one by one and analyze the credibility. Finally, advice, it is best not to buy valuables whose prices are very different from those of physical stores, and there will be no pies in the world.

how do you view the appraisal certificate level of a single pearl? S1477534 Is this a grade mark?

It should be a certificate number or a test basis.

It's not a test grade.

Please help me to see the authenticity of the pearl identification certificate. 1 points

Hello

You can check the authenticity of the pearl bracelet.

I hope the answer can help you

How do you see the jewelry identification certificate?

Identification of the authenticity of the jewelry identification certificate. Aspects

Step 1: Signs (the certificate also depends on the signs)

We can confirm that the testing organization that issued the certificate is approved by those special qualification certifications. The signs that appear on the general certificate are: "CMA"

"CMA" is the English abbreviation of China Metrology Accreditation. It is a comprehensive certification and evaluation of the testing ability and reliability of testing institutions by the metrological administrative departments of the people at or above the provincial level in accordance with the provisions of the People's Republic of China and the National Metrology Law. This sign only means that the institution is a unit that has passed the measurement certification review, and it is a necessary qualification for any unit that issues a jewelry appraisal certificate. The inspection report marked with "CMA" can be used for product quality evaluation, results and judicial appraisal, and has legal effect.

Step 2: Description of appearance (check the model)

The next step is to confirm whether the purchased jewelry and jade are consistent with the samples described in the certificate, including the photos of the samples, the weight on the label and the weight on the certificate, and whether the appearance and description of the ornaments correspond to each other.

photos are the direct evidence to distinguish different jewels and jade, and the identification certificate photos are clear and accurate, which will greatly increase the difficulty of forgery. However, in some cases, it is difficult to distinguish because the jewelry styles are similar and the photo features are similar. In this case, the accurate weight is another valid data that can be verified. In addition to photos and weight, the appraisal certificate will also provide some distinctive appearance features, such as the sugar color of jade, the size of bracelets and so on.

Step 3: Test the content (the most important content)

This step should be the test content that we are most concerned about, and we should know which content on the certificate is the most important.

diamond grading certificate: the most important thing to pay attention to is the color grade and clarity grade of the diamond, and some certificates also have the cut ratio of the diamond.

certificate of purity inspection of precious metal ornaments: the most important thing is, of course, the type and content of precious metals.

jewelry and jade appraisal certificate: the inspection conclusion is the most important. According to the national standards, natural jewelry and jade are no longer marked with the word "natural", but the artificially treated or artificially synthesized gems must be clearly stated, such as: the conclusion is "ruby", indicating that this ruby is purely natural; "Ruby (treatment)" indicates the specific treatment method, indicating that this ruby is a natural gem, but it has been artificially treated in some way to improve its appearance; "Synthetic ruby" means that ruby is not naturally produced, but a purely artificial laboratory synthesis.

"Remarks" column: Generally, some relatively special samples are encountered in the testing process, which will be explained and noted in the remarks. For example, in the appraisal certificate of Hetian jade, once the surface treatment is involved, the specific treatment method will be indicated in the remarks.

step 4: official seal or inspection mark

in order to prevent the certificate of appraisal institution from being counterfeited, the appraisal certificate must be stamped with the official seal of the company, and the red official seal as the inspection mark is often not printed integrally with the certificate, but stamped after inspection.

nowadays, some large authentication machines are carrying out heavy anti-counterfeiting. For example, in the new certificate issued in 27, Xinjiang Rock and Mineral Gem Quality Inspection Station also added the function of online inquiry. When inquiring, you need to enter the batch verification code and enterprise verification code, so that consumers can verify it in a convenient way and find out the relevant information of the jewelry and jade purchased online.

Step 5: Understand the standards

The general appraisal certificate will also indicate the basis standards for the identification and discrimination of jewelry and jade. The current national standards specifically include:

GB/T 16552 jewelry and jade names; GB/T 16553 jewelry and jade identification; GB/T 16554 diamond classification; GB/T 1843 Nondestructive testing method for precious metal jewelry content: X-ray fluorescence spectrometry; GB 11887 Rules and naming methods for purity of precious metals in jewelry.

If you see that the certificate has one or two of these standards, you can know what standards the jewelry and jade are tested according to. In addition, the certificate should also have the signatures of more than two appraisers and the appraisal date of the certificate. After understanding these five parts, whether your favorite baby is true or not and whether the certificate is consistent will come to the bottom.

Step 6: Understand the basic knowledge

The following are the definitions of terms commonly seen in jewelry appraisal certificates:

Color

Color is the feeling produced in the brain by the optic nerve of the fundus in response to light waves (visible light from 39nm to 78nm). After visible light is selectively absorbed by an object, the color produced by the mixing of its remaining light waves is the color of the object.

optical characteristics ......

pearl identification certificate

according to industry standards, the value of pearls is mainly measured from several aspects, such as bead diameter, shape level, luster level, smoothness level, matching, etc. The institutions that have the right to identify pearls are all national legal units, and their credibility is ok, and the possibility of fraud is relatively small. Of course, it cannot be completely ruled out. Therefore, to buy pearls, you should have some basic knowledge of pearls. In addition, you should find reputable merchants to buy them, so as to minimize the possibility of buying pearls that are not worthy of the name.

How can you tell whether a pearl necklace is true or false without a certificate?

First, fake pearls are generally made of two materials:

1. Made of glass balls, the surface of which is coated with a substance called "guanosine", which will give off luster similar to fish scales and glow like a rainbow.

2. Thick shells are round and have a luster similar to pearls.

characteristics of two kinds of fake pearls:

1. "pearls" made of glass will look very bright and have very regular shapes. If it is a necklace, each bead is very good and the size will be very consistent. If you look closely, you will find that its color is dead and will not be as unpredictable as a real pearl. If you feel it, you will feel that these "pearls" are a little greasy and not as refreshing as real pearls.

2. pearls made of shells

They are also very round, regular in shape, not too small in size, and have the luster of pearls, which can be said to be very difficult for ordinary people to distinguish. But if you look closely at its luster, you will find that all the light emitted from it is parallel stripes, no matter which angle you look at it. This is because the structure of shells is parallel, while the cross-sectional structure of pearls is concentric.

Third, identification method:

Real pearls are very natural and round in color. Its luster comes from the inside and looks crystal clear. Careful observation of its surface, we will find that its luster is layered, and sometimes there will be rings. Natural pearls generally have some tiny flaws more or less, and they are flawless, because perfect pearls are so rare.

1. With the naked eye, pearls have natural multicolored light, and their sizes and shapes will be different in a necklace.

2. Touch it with your hands to see if it is greasy or clear? Is it warm or cold? Pearl hands feel cool and cool.

3. Bite with your mouth. If you can't recognize it any more, bite with your mouth. The real pearl feels like sand, but you can't bite the glass ball.

4. when the pearl is rubbed on the glass, the real pearl has pearl powder stripes, while the fake pearl has no stripes.

5. real pearls are lightly scraped with pearl powder with a knife. Imitation pearls scrape off only a layer of skin.

6. Never believe that someone sells you very good pearls at a very cheap price. No one likes to lose money.

The following are the methods to distinguish pearls:

1. Vision: The shape of pearls is irregular, showing translucent jade white, yellow white, light blue, flesh red and other natural and unique five-color fluorescent luster; Most of the fake beads are glass imitations, with regular shape and uniform size. Generally, the surface of the beads is coated with "polishing liquid" made of silver powder or fish scales, which is monotonous in color and lacks halo.

2. Friction: When two pearls rub gently against each other, they will feel rough, while fake pearls will feel slippery.

3. drilling: observe whether the drilling is clear and clear, and there is pigment accumulation in the drilling of false beads.

4. Cold feeling: pearls feel cold when put on your hands, but fake pearls don't.

5. If the real pearls are scraped with a knife, there will be white powder!

6. Fake pearls are flawless, and the particle size is even

. The easiest way, if you have bought them, is to gently grind the beads with your teeth. {The real pearls won't cause any damage} Then the ones that feel gritty are real. If you don't buy it, you can rub it with two beads. What feels gritty is true, and what doesn't feel gritty is fake. First, visually, it looks like a carpet on the surface, like wallpaper

. Second, hold the pearl with your hands, feel the coolness, and then let it go to see if there are water drops on the surface of the pearl

. Third, bite it slightly with your teeth, and then touch the powder with your hands to see if there are traces

. Fourth, look with a magnifying glass to tell whether it is fresh water or seawater. Generally, fresh water has a regular halo. The price is generally determined by the size and roundness of the pearl, and it depends on the defects.

Sixth, to add, whether the pearl is genuine or not, you can also check whether there are any defects. If there are no defects at all, you should be careful. Of course,

There are also good pearls that are flawless but expensive.

Why doesn't the China National Pearl Appraisal Certificate state the place of origin?

Japan or the United States, write the place of origin, but the place of origin is just the writing of merchants or foreign institutions. Does not have any legal effect. Domestic pearls, whether produced in Tahiti or elsewhere, are identified in the same way and produced in the same way. It can only be said that the excellent rate of production in Tahiti is higher than that in other places, which does not mean that pearls of the same quality as Tahiti cannot be produced in other places. Therefore, it is impossible for the national appraisal center to give the place of origin. Besides, what you buy is not the place of origin, but the quality.

Just like diamonds, everyone says they are from South Africa. In fact, there are very few diamonds produced in South Africa, and no matter how they are identified, it is impossible to identify the place of origin. Said it was made in South Africa, just to cater to some people's admiration for foreign countries.

How to prove whether pearls are seawater pearls or freshwater pearls on the identification card for buying pearls

Pearls can be divided into natural pearls and cultured pearls. Natural pearls are natural secretions in animals such as shellfish or mussels without human factors. Natural pearls are divided into natural seawater pearls and natural freshwater pearls. Cultured pearls are the formation of nacre in shellfish, mussels and other animals, and the nacre is concentric layered or concentric layered radial structure. The chemical composition of cultured pearls is the same as that of natural pearls. Cultured pearls are divided into seawater cultured pearls and freshwater cultured pearls, which are the most common in the market. There is also a fake pearl.

Method of identifying the authenticity of pearls:

You can simply identify pearls by looking, touching, smelling and biting. Look, mainly through eye observation, pearls can emit all kinds of strange light by observing light. If the luster of a string of pearls is very uniform, and the color is monotonous and dull, it may be imitation pearls; Natural beads are rich in color and soft in luster.

Touch is mainly felt by hands. Natural beads are cooler and feel cool. If our hands feel that this bead is a little warm and greasy, we should be careful to fake it.

Smell, it means that the goods to be purchased are lightly heated. If there is bad smell or peculiar smell, it may be fake, and the real pearls are tasteless.

Biting or rubbing is through the feeling of teeth or two pearls rubbing against each other. The real pearl teeth bite with astringency or can rub out pearl powder, and the fake pearl teeth bite with slippery feeling.

If the price of the pearl you choose is high and you can't identify its authenticity, you can go to the Pearl Testing Station of the Bureau of Quality and Technical Supervision for testing.

First, the formation of pearls:

How can I apply for a pearl appraisal certificate

A place for jewelry appraisal? It must be not far from the antique market. Changsha Antique Street, located in Changsha Museum, Bayi Road, Changsha City, is very popular on Saturday morning. When you get there, you must ask the location of the collectors' association, find the collectors' association, and you will find the appraisal center. This is the case in that province. For more collection knowledge, please see my blog, where there are addresses of various antique cities in China. blog.sina/u/1465826893