1. The certificate number or inspection number on the certificate can be used to check whether the purchased goods are consistent with those on the certificate. If there is a code on the jade, it can also be compared with the code on the certificate. The normal inspection conclusion on the general certificate is jade. If the jade has been optimized, there will be a corresponding description.

2. Appearance First, look at whether the jade photo on the jade identification certificate is consistent with the real thing, and observe from the workmanship and color (the jade bracelet should also be checked for cracks). Total mass This is the weight of jadeite, which must be consistent with the certificate.

3. Look at the appraisal results. If the jadeite certificate issued by the authoritative organization is not natural grade A jadeite, the result is only "jadeite", and the words "grade A quality" and "natural" will not be marked. You know, only natural A goods will issue the certificate of the result of "Jade (A goods)".

4. Consumers are most familiar with the jade appraisal institutions of the quality inspection system, such as the National Jewelry and Jade Quality Supervision and Inspection Center. Look at the English logo. There will be "CMA", "CAL" and "CNAL" on the jade certificate, and one or more signs will represent the qualification of the appraisal institution.

5. Look at the signs: On a genuine jade certificate, the most conspicuous signs are several English abbreviations. Common signs are "CMA", "CAL" or "CNAL". CMA is a sign that the measurement certification of testing institutions is qualified, and the institutions with this sign are legal testing institutions.

6. First, carefully look at whether the shop opening organization that issued the jade jewelry inspection certificate has the right to issue the jade appraisal certificate.

Individuals go to jewelry appraisal institutions to appraise jade bracelets. What are the items on the certificate issued by the appraisal institution?

1, depending on the certificate, there are several points: depending on the appraisal conclusion: the conclusion of the appraisal certificate must be standardized.

2. Look carefully at whether the shop opening organization that issued the jade jewelry inspection certificate has the right to issue the jade appraisal certificate. Look at the first line of the jade appraisal certificate and pay close attention to whether there is a capitalized "CMA" national measurement certification mark.

3. Meaning of the logo on the jade appraisal certificate May, 20071Thursday, 2007 16: 58 Meaning of the logo on the appraisal certificate Consumers should ask merchants whether the jewelry they buy has an appraisal certificate. If there is an authentication certificate, they should check whether it is marked with "CMA", "CML" and "CNAL".

4. There are many styles of general jadeite bracelet appraisal certificates, and there are also many jadeite appraisal institutions that can issue appraisal certificates. The front of the jade bracelet appraisal certificate: it is the issuing unit, and the testing institution can be the quality inspection station under the provincial quality supervision bureau or the quality inspection station under the municipal quality supervision bureau.

5. First look at the jade appraisal institution. At present, the most authoritative assessment agency in China is NGTC directly under the Ministry of Natural Resources. Therefore, the jade inspection certificate issued by it has national authority and effectiveness.

6. There is really nothing wrong with the certificate. A goods are natural in the jade industry, and there is no need for artificial dyeing, glue injection and pickling. But as far as the certificate is concerned, this is a relatively poor jade bracelet with low value. The place you bought has a high premium rate and should be much more expensive.

What's in the jade appraisal book?

1. The jade certificate issued by the national authority is one of the appraisal results. If it is natural jadeite A, you will find the word "jadeite" and will also mark the words "A" and "Natural". Only natural A goods will issue the certificate of "Jade" result.

2. There are several points to understand the certificate: look at the appraisal conclusion: the conclusion of the appraisal certificate must be standardized.

3. Looking at the jade certificate mainly depends on the description of the jade identification elements. Such as certificate number, inspection conclusion, jadeite gram weight, size, refractive index, density, amplification inspection, etc.

4. The following points should be paid attention to in the content of the jade appraisal certificate: 1, and the appraisal conclusion must be: natural jade A goods. 2. Density: 33 ~ 34g/cm3. 3. Refractive index: 664, infrared spectrum analysis: characteristic spectrum of typical jadeite. 5. Magnification inspection: fiber structure, no filler.

What do you think of what is written in the jade appraisal book?

There are several points to understand the certificate: look at the appraisal conclusion: the conclusion of the appraisal certificate must be standardized.

Looking at the jade certificate mainly depends on the description of the jade identification elements. Such as certificate number, inspection conclusion, jadeite gram weight, size, refractive index, density, amplification inspection, etc. CertificateNo./InspectionNo.: You can check whether the purchased goods are consistent with the goods on the certificate. If there is jadeite with code, you can compare it with the code on the certificate.

Observe specific items and sexual characteristics; Observe the specific items in the jade appraisal book, such as physical, chemical and optical characteristics, to see if it is graffiti, and whether it conforms to the characteristics of jade and goods themselves. If there is inconsistent or incorrect information about a specific project, this certificate is likely to be false.

According to the current judgment of Jade, this is a B-goods. If this material is bought as A goods, it is a fake. If it is bought as B goods, it cannot be judged as a fake. In addition, the first line of the general certificate of Jade A goods will write Jade or Jade A goods.

First of all, look at the English abbreviation marks on the jade certificate, such as whether there are CMA and other marks. If there is, it means it is a genuine jade certificate.

How to treat the contents of jade appraisal certificate?

1. First, carefully look at whether the shop opening organization that issued the jade jewelry inspection certificate has the right to issue the jade appraisal certificate.

2. Only natural A goods will issue the certificate of "Jade" result. If it is grade B jadeite, one of the appraisal results in the certificate will be marked as "jadeite (treatment)", "jadeite (glue injection)", "jadeite (grade B quality)" or "jadeite (optimization)". C Jade will be marked with "Jade (Dyed)".

3. Appearance First of all, look at whether the jade photo on the jade identification certificate is consistent with the real thing, and observe it from the workmanship and color (the jade bracelet should also be checked for cracks). Total mass This is the weight of jadeite, which must be consistent with the certificate.

4. The normal test conclusion on the general certificate is writing jade. If jade is optimized, it will be described accordingly. There are also the names of jade ornaments, which will be marked as jade pendants and jade bracelets.

5. Look at the signs: On a genuine jade certificate, the most conspicuous signs are several English abbreviations. Common signs are "CMA", "CAL" or "CNAL". CMA is a sign that the measurement certification of testing institutions is qualified, and the institutions with this sign are legal testing institutions.

What does the remark on the jade appraisal book mean?

Commonly known as "A" refers to the remarks on the jade appraisal certificate, which usually means that this kind of jade is of low grade, average quality and relatively cheap market price. It is a well-known and popular commodity.

Goods A are natural jadeite whose internal structure has not been artificially processed. "A, B, C, D" goods are a term used by experts to distinguish natural jadeite from artificially treated jadeite, and do not represent good, medium and poor natural jadeite.

If the jadeite identification certificate indicates that it is natural A goods and other ingredients, it means that jadeite may also carry associated minerals. Not fake, but impure. For reference only.

Impurities are removed by soaking in acid solution and artificially beautified, that is, the color is true and the transparency is false. C goods refer to dyed jadeite, that is, jade is true in quality and false in color. All or part of it is dyed emerald green or purple. D goods are fake jadeite, and the ingredients may be synthetic glass, crystal, etc.

The common name A in jadeite detection remarks is equivalent to the genuine product. Because A goods mostly appear in clothing, shoes and hats and other industries, generally refers to high imitation fakes.