The most comprehensive jade identification method in history - identification of B-grade and B+C-grade jade

For people who like jade, what they care most about is whether this piece of jade is natural jade. The most terrifying counterfeit jade is B-grade and B+C-grade jade. Identifying B-grade and B+C-grade jade is a critical technology. Many people who understand it are often unwilling to teach it, and those who are willing to share often cannot explain it clearly. Based on my years of experience in jewelry appraisal training, I share this technology in the most understandable way. If nothing else, just to prevent you or the people you care about from being fooled.

Generally speaking, A-grade clothes and bags refer to high-quality imitation products, while A-grade jade refers to natural jade, which is different from A-grade bags. B-grade jade is jade that has been acid-washed, bleached and injected with glue. Many people ask, if it is jade, why do we need to process it? This is because the raw material of jade is too poor and it will be completely waste if it is not made into B-grade jade.

B+C goods are made by adding a dyeing step during the production process of B goods. That is to say, jadeite that has been acid-washed, dyed and injected with glue.

This is a photo of the processing of B-grade goods. Many people may wonder why it is tied with a circle of iron bars. That's because the structure is too loose and the iron bars are not tied together, so they are easy to break and shatter during the pickling process.

Cut into bracelet blanks and then carry out pickling and glue injection, because this way the pickling and glue injection time is faster and more efficient. If the raw stone is acid washed, everything will be broken after washing.

Isn’t it so beautiful after polishing? If it were natural jade, it would definitely be worth tens of thousands of dollars. But the products produced by the manufacturers of B-goods are sold as B-goods. And it is very cheap, but if it falls into the hands of big scammers or some tourist shops, I can only say "haha".

So how do we identify the key? Let’s talk about it point by point.

Feature 1: Clean background

The bracelet that has been acid-washed has had its base color pure and clean because the impurities and minerals have been washed away.

If jade is originally green, black, or purple. These colors will remain after pickling. But yellow, brown and red will be washed cleanly.

Feature 2: Glue-filled pits

The structure of jadeite after acid washing is severely damaged, and pits may occasionally appear in some parts. After glue injection, these pits will be filled with glue. The pits filled with glue are one of the ironclad evidences for identifying B-grade jadeite.

Feature 3: Acid Etching

There will be a large number of acid-etched textures on the surface of jadeite after acid washing and glue injection. These textures penetrate into the interior of the jadeite and cannot be removed by polishing. This texture is also the identification feature of B-grade jadeite.

Feature 4: Structural Fuzziness

After acid washing, the entire jade will become very loose, like a brick, and it is particularly easy to break, so glue needs to be injected to strengthen the structure. However, after glue injection, the entire jade will become like cooked rice, and the granularity will become very fuzzy.

Color distribution characteristics of dyed jadeite and A-grade jadeite

The color and shape of A-grade jadeite are clear, the color roots are obvious, and the color is distributed in root-like, dot-like, and vein-like shapes. The color of dyed jade is mainly distributed between the particles or in the cracks, appearing in a silk screen or tree root shape.

The color of A-grade jade is often uneven and has obvious shapes.

The color boundaries of A-grade jadeite are clear and the color shapes are obvious.

The color of dyed jade is diffuse and has no clear shape.

The color of B-grade jadeite is blurred, with no specific shape and no clear boundaries.

Cracks are prone to dye accumulation

The dyes used to dye jade tend to accumulate in the cracks.

If you still don’t understand, let me tell you about a small instrument that can identify B grade B+C jadeite simply and efficiently.

Since glue can emit visible light under ultraviolet light, B-grade jadeite will also glow under ultraviolet light because it contains a large amount of glue.

A good quality UV fluorescent flashlight, although turned on, has almost no visible light, which is very important.

If you put A-grade jadeite and B-grade jadeite together and shine them under ultraviolet fluorescent light, the B-grade one is glowing, and the A-grade one is not glowing.

It should be noted that you need to turn it on in a dark environment to see this faint glow.

If you still haven’t learned the above methods, then look at the final ultimate trick - issuing a jade identification certificate. If a friend asks, there are also fake certification agencies. Yes, there are real and fake ones. Let me tell you what kind of certificates are recognized by the country.

There are a few key signs here.

“CMA” is the English abbreviation of China Metrology Accreditation. This mark only means that the organization has passed the metrological certification review, which is a qualification that any organization that issues jewelry appraisal certificates must possess. Inspection reports marked with "CMA" can be used for product quality evaluation, results and judicial appraisal and have legal effect.

CAL: The mark of a testing and inspection agency that has been approved by the national quality review. An agency with this mark is qualified to make arbitration inspection conclusions. An institution with CAL has a much better work quality and reliability than an institution with only CMA.

CNAS: The English abbreviation of China National Accreditation Service for Conformity Assessment, which is the national accreditation mark for Chinese laboratories.

ILAC: The English abbreviation for International Laboratory Accreditation Cooperation. With this recognition, the certificate is recognized by laboratories in 47 economies around the world.

These qualifications must be reviewed and assessed by the state before they can be used. Unqualified laboratories can be closed down in minutes.

Check the specific contents of the certificate and compare the purchased jewelry and jade with the samples described in the certificate to see if they are consistent, including: the weight of the jewelry and the weight on the certificate, the appearance of the jewelry and the photo and color description on the certificate. By the way, the two people who signed are both my friends, and I am also a registered signature appraiser.

At the same time, in order to prevent the certificates of the appraisal agency from being counterfeited, the appraisal certificate will be stamped with the official seal/steel stamp of the organization.

In addition to issuing paper appraisal certificates, some large appraisal institutions also provide a variety of inquiry methods such as online, text messages, and QR codes.

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