Since the opening of 20 12 Pearl website, the Pearl certificate has entered the stage of network 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 pearl products are submitted for inspection, a unique certificate number, inspection number and check code are generated according to law. The system stores these codes and inspection information of pearls in the unique two-dimensional code identification of samples. Consumers can scan the QR code on the certificate through smart phones, jump to the page where inspection information is stored, query the identification information of the product corresponding to the current certificate, and obtain accurate information on the quality, size, color and shape of pearl products. According to this information, consumers can completely judge the authenticity, value and other information of pearls.

Ask the question of pearl appraisal certificate

I also bought pearls on Taobao. Personally, don't be superstitious about certificates when buying valuables online. It's best to know what to buy first, including how to tell the good from the bad.

Simply understand, you can search for similar goods online first, and then go to the physical store to see similar things. Don't start blindly.

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

How to treat the appraisal certificate grade of a single pearl? S 14077534 is this a mark of achievement?

It should be a certificate number or an examination basis.

Not the test level.

Please help us check the authenticity of the pearl appraisal certificate. 10.

hello

You can look at real pearl bracelets.

I hope the answer can help you.

How to judge the authenticity of jewelry appraisal certificate

The appraisal of jewelry appraisal certificate includes the following aspects.

Step 1: Tag (the certificate also depends on the tag)

We can confirm that the testing organization that issued the certificate has passed those special qualifications through the sign on the certificate. The sign that appears on a general certificate is "CMA".

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

Step 2: Appearance description (look at the model and observe the sample)

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 jewelry correspond.

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, because the jewelry styles are similar and the photo features are similar, it is difficult to distinguish them. 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 bracelet and so on.

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

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

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

Purity inspection certificate 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 standard, natural jewelry and jade are no longer marked with the word "natural", but must be marked with artificial processed or synthetic gems, such as: the conclusion is "ruby", which means that this ruby is pure natural; "Ruby (treatment)" means the specific treatment method, which means that this ruby is a natural gem, but its appearance has been improved by some artificial treatment; "Synthetic ruby" means that ruby is not naturally produced, but is purely synthesized by artificial laboratory.

"Remarks" column: Generally, some relatively special samples will be encountered in the testing process, which will be explained 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 forged, the appraisal certificate must be stamped with the official seal of the unit, and the red official seal as the inspection mark is often not printed with the certificate, but stamped after inspection.

Now some large authentication machines are carrying out heavy anti-counterfeiting. For example, Xinjiang Rock and Mineral Gem Quality Inspection Station added the function of online inquiry in the new certificate issued in 2007. When inquiring, you need to enter the batch verification code and enterprise verification code, which is convenient for consumers to verify and understand the relevant information of jewelry and jade purchased online.

Step 5: Understand the standards.

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

GB/T 16552 name of jewelry and jade; GB/T 16553 jewelry and jade identification; GB/T 16554 diamond classification; GB/T 18043 nondestructive testing method of precious metal jewelry content: x-ray fluorescence spectrometry; GB 1 1887 Rules and naming methods for the purity of precious metals in jewelry.

If you see one or two of these standards on the certificate, you can know what standards jewelry and jade are tested according to. In addition, the certificate should also have the signatures of more than two appraisers and the date of identification of the certificate. Knowing these five parts, you will find out whether your favorite baby is true or not, and if the certificate doesn't match.

Step 6: Understand the basics.

The following is the noun explanation of the inspection items that are often seen on the jewelry appraisal certificate:

Color color

Color is the feeling produced in the brain by the response of the optic nerve of the fundus to light waves (visible light from 390nm to 780nm). 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 characteristic optics ......

Pearl identification certificate

According to industry standards, the value of pearls is mainly measured from the aspects of bead diameter, shape grade, luster grade, smoothness and matching degree. The institutions that have the right to identify pearls are all national legal entities, and their credibility is OK. The possibility of fraud is relatively small, and of course it cannot be completely ruled out. Therefore, to buy pearls, you must have some basic knowledge of pearls. In addition, it is necessary to find a reputable merchant to buy and minimize the possibility of buying pearls that are not worthy of the name.

How to tell the authenticity of a pearl necklace 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 glow like a fish scale and shine like a rainbow.

2. The thick shell is ground, very round, and has a pearl-like luster.

Second, the characteristics of two kinds of fake pearls:

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

Grind shells

Pearls are also round, regular in shape, not too small in size, and have the luster of pearls, which can be said to be difficult for ordinary people to distinguish. But if you carefully observe its luster, you will find that the light it emits is parallel stripes from any angle. This is because the structure of shells is parallel, while the cross-sectional structure of pearls is concentric.

Third, the 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 are 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 colorful light, and in a necklace, the size and shape will be different.

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

3. bite with your mouth. If you don't recognize it again, bite it with your mouth. Really, pearls feel like sand, but you can't bite the glass ball.

4. When the pearl rubs on the glass, the real pearl has pearl powder stripes and the fake pearl has no stripes.

5. Real pearls gently scrape pearl powder with a knife. Imitation pearls only scrape off a layer of skin.

6. Never believe that someone sells you very good pearls at a very cheap price. Nobody likes to lose money.

Here are the ways to distinguish pearls:

1, vision: the pearl is irregular in shape, showing translucent natural and unique five-color fluorescent luster such as jade white, yellow white, light blue and meat red; Most of the fake beads are glass imitations, with regular shapes and the same size. Generally, the surface of beads is coated with "polishing solution" made of silver powder or fish scales, which is monotonous in color and lacks halo.

2, friction: two pearls gently rub each other, there will be a sense of roughness, while fake pearls have a sense of sliding.

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

4, cold feeling: pearls have a cold feeling on their hands, and fake beads do not.

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

6. The fake pearls are flawless and the particle size is uniform.

The simplest way, if you have already bought it, you can gently grind the beads with your teeth. {Real pearls won't do any harm} Then what feels gritty is real. If you don't buy it, you can wipe it with two beads. What feels like sand is real, and what feels like no sand is fake. First of all, visually, the surface of ordinary fakes looks like carpets and wallpaper.

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

Third, gently take a bite with your teeth, and then touch the powder with your hands to see if there are any traces.

Fourth, look at it with a magnifying glass and tell whether it is fresh water or seawater. Generally, fresh water has a regular halo and seawater has a radial shape.

Fifth, the price is generally determined by the size, roundness and defects of pearls.

Sixth, by the way, you can also check the authenticity of pearls for flaws. If there are no flaws, be careful. Of course.

There are also very good pearls, flawless, but expensive.

Why didn't China National Pearl Appraisal Certificate indicate 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 other places, are all identified in the same way and produced in the same way. It can only be said that the superior yield of Tahiti is higher than that of other places, which does not mean that pearls with 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 belong to South Africa. In fact, there are very few diamonds produced in South Africa, and it is impossible to identify the place of origin no matter how it is identified. It is said that it is made in South Africa, just to cater to some people's admiration for foreign countries.

How to prove whether it is a seawater pearl or a freshwater pearl on the pearl identification card?

Pearls are divided into natural pearls and cultured pearls. Natural pearls are natural secretions in animals such as shellfish or mussels, and do not contain 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. And a fake pearl.

Methods of distinguishing pearls from real pearls;

It can be identified simply by looking, touching, smelling and biting. Look, mainly through the eyes, 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 dim, it may be imitation pearls; Natural beads are rich in color and soft in luster.

Touch, mainly through the hands to feel, natural beads are cooler and feel better. If our hands feel that this bead is a little warm and greasy, we should be careful to fake it.

Smell, that is, the goods to be purchased are slightly heated. If there is an odor or an odor, it may be fake, and the real pearl is tasteless.

Biting or rubbing is the feeling of rubbing each other through teeth or two pearls. Real pearl teeth have a astringent feeling or can rub out pearl powder, while fake pearl teeth have a slippery feeling.

If the price of the pearls you choose is high and it is impossible to identify their authenticity, you can go to the Pearl Testing Station of the Bureau of Quality and Technical Supervision for testing.

First, the formation of pearls:

Excuse me, how to apply for a pearl appraisal certificate?

Where jewelry is appraised. 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, which contains the addresses of various antique cities in China. blog.sina/u/ 1465826893