What Are the Differences Between Jadeite A, B, and C Grades? How Can Ordinary People Tell Them Apart?

As a professional with over a decade of experience in the jewelry industry, I am well aware of the complexity and confusion in the jadeite market, especially regarding the concepts of "A-grade, B-grade, and C-grade" jadeite, which often perplex ordinary consumers. Today, I will analyze the essential differences among these three grades from a professional perspective and provide a practical set of identification methods.

Key Conclusion: Jadeite A-grade refers to natural jadeite without any chemical treatment, possessing both collectible and wearable value; B-grade jadeite has been treated with strong acid soaking and polymer impregnation, damaging its structure; C-grade jadeite is B-grade jadeite further artificially dyed. Ordinary consumers should rely on authoritative certification and combine visual inspection, tactile feel, sound, and other auxiliary methods for preliminary judgment.

1. The Essential Differences Between Jadeite A, B, and C Grades

First, it is important to understand that the classification of A, B, and C grades is based on whether jadeite has undergone "enhancement treatments" and the "degree of treatment." Here, "treatment" specifically refers to chemical or physical methods that alter the internal structure and color of jadeite.

  • Jadeite A-grade (Natural Jadeite Jade):

* Definition: Natural jadeite that has not undergone any chemical treatment, only traditional mechanical processing such as cutting, grinding, and polishing. Its internal structure, color, and texture are naturally formed, preserving the original characteristics of jadeite.
* Characteristics: Dense structure, warm and glossy (glass-like luster), natural color distribution, exhibiting "jade texture" (also known as "fly wing" effect). The sound when tapped is crisp and pleasant. Under ultraviolet (UV) light, it usually shows no fluorescence or only weak inert fluorescence.
* Value: Holds the highest collectible and wearable value. Its price is influenced by factors such as texture, translucency, color, craftsmanship, and size, and it enjoys the highest market recognition.
* Market Data: According to the Gem and Jewelry Trade Association of China (GAC), A-grade jadeite accounts for over 95% of transactions in the high-end jadeite market and is the mainstream.

  • Jadeite B-grade (Treated Jadeite Jade - Bleached and Polymer Impregnated):

* Definition: Jadeite that has been soaked in strong acid to remove internal impurities (such as yellow-brown iron stains and black spots), then filled with polymer resins (e.g., epoxy resin) to fill cracks and pores. This treatment aims to improve transparency and clarity.
* Characteristics: The structure is damaged by strong acid, becoming loose. The resin filling reduces density and hardness. The surface luster often appears "waxy" or "resin-like," inferior to the glassy luster of A-grade jadeite. Colors often look "floating" or unnatural. The tapping sound is dull. Under UV light, B-grade jadeite typically emits distinct blue or yellow-green fluorescence, characteristic of the resin filling.
* Value: Due to internal structural damage, poor stability, and resin aging/yellowing over time (causing cloudiness and loss of luster), B-grade jadeite has almost no collectible value and significantly reduced wearable value. Its market price is far lower than A-grade.
* Industry Case: In the early 2000s, B-grade jadeite flooded the market, damaging consumer confidence. The State Administration for Market Regulation and industry associations subsequently strengthened regulations, mandating clear labeling of "treated" and prohibiting calling B-grade jadeite "natural jadeite."

  • Jadeite C-grade (Dyed Jadeite Jade):

* Definition: Jadeite that has been artificially dyed on top of B-grade treated jadeite. The purpose is to imitate the vivid colors of A-grade jadeite to deceive buyers.
* Characteristics: Exhibits both the structural damage and resin filling features of B-grade jadeite. Colors are often overly bright and uniform, lacking natural color roots and transitions, appearing "stiff" or "superficial." Under a Chelsea filter, some dyes show red coloration. Under UV light, fluorescence is present and color distribution may be uneven. Wiping with an alcohol-dipped cotton swab may cause color to fade.
* Value: C-grade jadeite has no collectible value and may pose potential health risks due to harmful substances in dyes. It is the lowest-priced and a typical fraudulent product.
* Warning Data: Regulatory authorities seize large quantities of C-grade jadeite annually, especially in tourist spots and informal channels. Consumers must remain highly vigilant.

2. How Can Ordinary People Tell A, B, and C Grades Apart?

For ordinary consumers, the safest method is to rely on certification issued by authoritative institutions. However, mastering some basic visual identification skills can help with preliminary screening before purchase.

  • Check the Certificate:

* The most important and only reliable identification method. Always request a certificate from a nationally recognized gemological laboratory (such as GIC, NGTC, CGL) when buying jadeite. The certificate will clearly state "Jadeite A-grade" or "Natural Jadeite," or specify "Treated Jadeite (B-grade)" or "Dyed Jadeite (C-grade)."
* Data: According to the national standard GB/T 16552-2017 "Gemstones - Names," natural jadeite identification results should be "Jadeite" or "Jadeite (A-grade)." Any mention of "B-grade," "C-grade," "treated," "filled," or "dyed" indicates it is not natural A-grade jadeite.

  • Observe the Luster:

* A-grade: Surface shows a glass-like luster, bright, sharp, and evenly reflective.
* B-grade: Surface luster often appears "waxy" or "resin-like," weaker and fuzzy, sometimes showing acid-etching patterns.
* C-grade: Similar to B-grade, with poor luster and unnatural color distribution.

  • Observe the Color:

* A-grade: Natural, layered colors with "color roots," smooth transitions, varying depths, sometimes showing natural spots or color lines.
* B-grade: Colors often appear "floating," lacking color roots, uniformly dull, sometimes clustered unnaturally.
* C-grade: Overly bright and uniform colors, lacking natural variation, often showing dye infiltration along cracks visible under magnification.

  • Examine the Structure ("Jade Texture"):

* A-grade: Under light, rotating the jadeite may reveal star-like reflections on cleavage planes, known as "fly wings," a hallmark of natural jadeite. Also visible are interwoven fibrous structures.
* B-grade/C-grade: Acid treatment destroys internal structure; "fly wings" are absent or blurred. Surface often has acid-etching patterns, and resin filling is visible under magnification.

  • Listen to the Sound:

* A-grade: When gently tapped with a hard object (e.g., coin or another jadeite piece), it produces a crisp, pleasant, and resonant sound, like a wind chime.
* B-grade/C-grade: Due to loose internal structure and resin filling, the tapping sound is dull and hoarse, lacking resonance.

  • Feel the Texture:

* A-grade: Dense and heavy, with a lasting cool sensation.
* B-grade/C-grade: Relatively lighter, with a shorter duration of coolness.

  • UV Fluorescence Test (Used by Professionals):

* A-grade: Usually no fluorescence or only weak inert fluorescence.
* B-grade/C-grade: The epoxy resin filling fluoresces clearly blue or yellow-green under UV light, an important auxiliary identification method.

3. Practical Advice and Summary

  • Purchase Channels: Always choose reputable jewelry stores or brand counters with proper business licenses. Avoid buying high-value jadeite from tourist spots, street vendors, or live-stream sales.

  • Request Certificates: Always ask for authoritative gemological certificates and verify that the certificate information matches the actual item.

  • Learn the Basics: Increase your knowledge of jadeite to improve your appraisal skills, but do not overly trust verbal expert opinions—certificates are the ultimate proof.

  • Price Consideration: A-grade jadeite prices fluctuate widely, but B-grade and C-grade jadeite prices are usually much lower. Be cautious if you encounter "perfect" jadeite at suspiciously low prices; it is likely B-grade or C-grade.


In summary, the essential difference between jadeite A, B, and C grades lies in whether and how much chemical treatment has been applied. For ordinary consumers, the most reliable identification method is to check authoritative certification. Combined with the above visual inspection, tactile feel, and sound tests, you can effectively reduce the risk of purchasing counterfeit or inferior products. I hope my professional insights help you find your truly cherished treasure in the vast sea of jadeite.