Hello everyone, I'm your jade buying consultant. Many friends receive an identification certificate when purchasing jade. But faced with the dense professional terms on it, do you feel confused? Don't worry, today I will teach you how to understand jade identification certificates, so you can buy with clarity and confidence!

Introduction: Certificate in Hand, But Still Unsure?

Imagine spending thousands or even tens of thousands of yuan on a beloved piece of jade, and the seller hands you an "authoritative" identification certificate. You happily accept it, only to find that besides the words "Natural Jadeite A-grade," you can't understand anything else. Is this jade worth the price? Is it really good? These questions often arise from not understanding the certificate.

Core Knowledge: The "Secrets" on the Certificate

Jade identification certificates are usually issued by national authoritative institutions or qualified laboratories. Although the formats vary, the core content is largely similar. We need to focus on the following key information:

  • Identification Conclusion (or Test Result): This is the soul of the certificate!

* Jadeite: You must see "Natural Jadeite A-grade." A-grade means natural jadeite that has not undergone any chemical treatment. If "B-grade," "C-grade," "B+C-grade," or "Treated Jadeite" appears, it means the jade has been treated with acid washing, resin filling, dyeing, etc., which significantly reduces its value, or even makes it worthless.
* Hetian Jade: Usually states "Hetian Jade" or "Hetian Jade (Origin)," such as "Hetian Jade (Xinjiang)," "Hetian Jade (Qinghai)," etc. If it only says "Jade" or "Nephrite," it may not be Hetian jade in the traditional sense, or its origin is unknown. Note that there are "Russian material" and "Korean material" on the market, which also belong to the Hetian jade category, but their quality and price differ from Xinjiang Hetian jade.
* Other Jades: Such as "Natural Agate," "Natural Xiuyan Jade," etc., the conclusion will directly state the specific type of jade.

  • Refractive Index (RI): An important parameter of jade's optical properties.

* Jadeite: Standard value 1.66. If not, it may not be jadeite or has been treated.
* Hetian Jade: Standard value 1.610±0.010.

  • Density: Mass per unit volume, also an important basis for identification.

* Jadeite: Standard value 3.33g/cm³.
* Hetian Jade: Standard value 2.95g/cm³.

  • Magnification: Describes the internal structural characteristics of the jade.

* Jadeite A-grade: Usually described as "fibrous intergrowth structure," "granular structure," etc., and may mention "visible natural mineral inclusions." If words like "reticulated structure" or "filling material" appear, it may be B-grade or C-grade.
* Hetian Jade: Often described as "felt-like structure," "intertwined structure," etc.

  • Spectrum: Analyzes the coloring elements and presence of treatment through absorption spectroscopy.

* Jadeite A-grade: Usually shows characteristic absorption lines of jadeite. If absorption lines related to dyes appear, it may be C-grade.

  • Infrared Spectrum: Primarily used to detect organic resin filling.

* Jadeite A-grade: No characteristic absorption peaks for fillers. If absorption peaks for organic resin appear, it is B-grade or B+C-grade.

  • Mass: The weight of the jade, usually in grams (g).


  • Dimensions: The length, width, and thickness of the jade, usually in millimeters (mm).


  • Photo: The certificate will include a photo of the actual jade, verify if it matches the actual item.


  • Testing Agency Information: Includes the agency's name, qualification certification, website, phone number, etc. You can use this information to verify the authenticity of the certificate on their official website.


Specific Advice: Three Steps to Easily Understand the Certificate

  • Step One: Look at the Identification Conclusion.

* Jadeite: Only recognize "Natural Jadeite A-grade." This is the bottom line! If not, give up directly.
* Hetian Jade: Look for "Hetian Jade" and pay attention to the origin description. Xinjiang Hetian jade has the highest value, followed by Russian and Korean materials.

  • Step Two: Verify Key Parameters.

* Compare with the standard values for refractive index, density, etc., that I mentioned above. Although these parameters are difficult for ordinary people to measure directly, if the values on the certificate deviate significantly from the standard values, be vigilant.
* Practical Tip: Before purchasing, you can search online for the standard parameters of the type of jade you are buying, so you have a clear idea.

  • Step Three: Verify the Authenticity of the Certificate.

* Online Query: Most reputable appraisal agencies have an online query system. Enter the certificate number, mass, and other information to verify if the certificate content matches. This is the most important step!
* Match Photos: Carefully compare whether the photo on the certificate completely matches the actual item, including details such as color, shape, texture, and flaws.
* Check Anti-Counterfeiting Marks: Many certificates have anti-counterfeiting codes, watermarks, steel stamps, etc., pay attention to identification.

Precautions: Pitfall Avoidance Guide

* Only Look at the Conclusion, Not the Parameters: Some unscrupulous sellers will issue a "Natural Jadeite" certificate, but it is actually B-grade or C-grade. Just looking at the word "natural" is far from enough; you must clearly see "A-grade"!
* Small Agency Certificates: Try to choose certificates issued by national or provincial authoritative institutions, such as: National Gemstone Testing Center (NGTC), China University of Geosciences Gem Testing Center, etc. Certificates issued by small agencies or private individuals have lower credibility.
* Certificate Does Not Match the Actual Item: This is one of the most common scams. The certificate may be real, but the jade has been swapped. Therefore, matching the photo with the actual item is crucial.
* Price Does Not Match the Certificate: If the price of an "A-grade jadeite" is far below the market price, even with a certificate, be extra cautious to prevent fake certificates or discrepancies between the certificate and the actual item.
* Price Reference:
* Ordinary A-grade Jadeite Bangle: Ranging from a few thousand to tens of thousands of yuan, depending on clarity, color, and craftsmanship.
* High-quality A-grade Jadeite Bangle: Tens of thousands to hundreds of thousands, or even higher.
* Ordinary Hetian Jade Bangle (non-Xinjiang material): A few hundred to a few thousand yuan.
* High-quality Xinjiang Hetian Jade Bangle: Tens of thousands to hundreds of thousands, or even higher.

Conclusion: Certificate is a Stepping Stone, Eye for Detail is True Skill

Jade identification certificates are an important reference for purchasing jade, helping us to initially screen and identify. However, it is not foolproof, and the final purchasing decision still requires combining your eye for detail, experience, and budget. Look more, learn more, compare more, and if you encounter uncertainties, it's better to give up than to blindly buy. I hope today's sharing can help everyone avoid detours on their jade purchasing journey and buy truly beloved good jade! Happy jade playing!