How to read the contents of a jade identification certificate?

Many people are worried that they will buy fake jade, so they choose to buy jade jewelry with identification certificates, but the problem arises again. Many jade lovers find that the content of the jade identification certificate is rather complicated and they don’t know how to read it for a while.

The contents of appraisal certificates issued by different institutions may not be exactly the same, but most appraisal certificates contain nine items: number, verification code, appraisal result, shape, total mass, color, magnified observation, remarks, inspector and reviewer.

The certificate contains a lot of text, which can be summarized into three aspects: conclusion, appendix, and notes. In addition, there are usually three logos and an anti-counterfeiting label on the back of the certificate. These three logos and the anti-counterfeiting label are all very important, and the anti-counterfeiting label is generally difficult to counterfeit.

in conclusion

I believe that many people will look at the conclusion as soon as they get the appraisal certificate. This is also what we care about most. If the jade is a natural product, the certificate will state: jade. Or it can be marked: natural jadeite, jadeite (Grade A).

If the raw material of the jewelry is jade, but it has been artificially processed, the certificate will show "Jade (processed)" or "Jade (B goods)", etc., and may also indicate the specific processing method, such as "Jade (dyed)".

If it is D-grade jadeite, that is, other minerals are used to impersonate jadeite, some institutions will also indicate the type of mineral, such as water foam. The text displayed by different institutions may not be exactly the same, but we can all see the properties of jadeite through the conclusion.

Attached

The contents of some appraisal certificates are more specific and will include more information, such as refractive index, optical characteristics, density, etc. Of course, these contents are more professional.

Many consumers may find it difficult to understand, but that’s okay. We can ask staff to explain it, but we must ask qualified people to explain it, as jade identification work also requires a certificate.

Remark

The remarks column contains some additional information. For example, the matching stone has not been tested, which means that only the jade itself has been checked, and the matching accessories such as beads have not been tested. Additional information may or may not be there, so just pay attention to it.

The jade identification certificate actually contains a lot of information, and we can see a lot of content from it. At the same time, we cannot rely too much on the certificate. How to make a preliminary judgment on the authenticity of jade is also something we need to learn.

According to

We first hold the jade under strong light, or illuminate it with a strong flashlight. Generally speaking, the luster of real jade will be more natural, the color trend will be clearer, and the luster will be stronger. The color of dyed jade will appear less natural.

Weigh

Among many jades and minerals, the density of jadeite is relatively high. Under the same volume, jadeite will be heavier than some counterfeit products. If jadeite is processed and its impurities are washed away, the weight may be slightly lighter.

touch

Natural jade is always smooth after polishing, but B-grade jade and C-grade jade need to be acid-washed and injected with glue. In this process, high temperature is used to clean impurities inside the jade and inject pigment into the jade.

This series of operations will make the surface of the jade rough. Of course, with the rapid development of technology nowadays, people will also polish B-grade jade and C-grade jade again. The difference may be reduced and it is difficult for us to feel it.

C-Grade Jade

knock

When you strike jade with agate or crystal, natural jade will emit a clear and melodious sound. The processed jade has its internal structure damaged, so the sound will sound dull. The difference is quite subtle, and we have to be very careful to distinguish it.

Buying fake jade is indeed a very annoying thing, and checking the contents of the certificate and distinguishing the real and fake jade is also rather cumbersome.