Put three jadeites under fluorescent light and observe their color changes. A and C did not change, and B produced fluorescence, which was white. C is dyed, so its color is distributed along the crack and uneven. Careful observation can be seen with the naked eye. The specific explanation is as follows:

A is jade, natural jade, without chemical treatment, the color and fruit are natural.

B is jadeite, bleached and glued jadeite, washed with strong acid and glued. Soaking and cleaning with strong acid is helpful to improve the transparency and color of jadeite.

C jadeite, dyed jadeite, is artificially colored jadeite, usually washed with strong acid, injected with glue and artificially colored with organic or inorganic dyes.

Extended data:

Other methods to identify jadeite jade without flashlight.

Emerald "Emerald" can't be used as the characteristic sign of natural jadeite. In other words, what is not "emerald" is not necessarily natural jade. Of course, it's easier to tell if it's emerald. Therefore, the more high-end things, the fewer defects, but the easier it is to be artificially imitated.

With the continuous improvement of counterfeiting technology, new jade species have been discovered and entered the jade market, and the knocking sound can no longer be used as the basis for judging jadeite A and B goods.

Some jade sellers often use two bracelets to make a crisp "clang sound", indicating that it is natural jade, and the impact sound of jade B goods filled obviously is slightly dull. However, it is not necessarily natural jadeite that makes "clanging sound", but amphibole sodium jade (such as Myanmar "ink painting" jade) also has this sound. At present, some B-goods appearing on the market can also make a crisp "clang".

Mesh. Emerald rinsed with strong acid generally has obvious pores and network structure. Stress and weathering in natural jadeite can also produce obvious pores and reticular structures, which are often difficult to distinguish from reticular cracks caused by acid corrosion. The view that "people who observe cracks, pits and pits must be B goods" may not be appropriate.

The natural pores of jadeite can be filled with zeolite and clay minerals in the later stage, and may also be filled with mineral powder or polishing powder during cutting, grinding and polishing. These fillers are not B goods and are easy to identify.

Appraisal certificate Generally speaking, the appraisal certificate of natural jadeite (A) will be marked with "Jade", "Natural Jade", "Jade (A)" and "Jade (Natural)", while goods B and C will be marked with "Jade (Treatment)" or "Jade (Optimization)".

The appraisal certificates issued by various institutions should be credible, but some profiteers will issue fake appraisal certificates or genuine fake jade articles. For example, some plain goods with inconspicuous features will be used for repeated identification certificates and distributed to counterfeit goods with similar appearance for sale.

In addition, some appraisal institutions relax their standards and issue irresponsible certificates for profit. These still need to be analyzed in detail, and look at various commodities and certificates. Only when they have more knowledge will they reduce the chance of being cheated.

National Inspection Certificate: National Jewelry and Jade Quality Supervision and Inspection Center is a national-level jewelry and jade quality inspection institution authorized by law and recognized by the qualification accreditation laboratory of national-level product quality supervision and inspection institutions. It is an authoritative institution in the field of jewelry and jade inspection in China and has been designated as a national-level scientific and technological achievement appraisal institution, an import and export commodity inspection laboratory of China Consumers Association and a commodity designated laboratory.

The style of the national inspection certificate is unified throughout the country and should be searchable on the national network, without regionality.

References:

Baidu encyclopedia-emerald