The Essential Differences Between Jadeite A, B, and C Grades and a Guide for Layperson Identification

Conclusion upfront: The core distinction among jadeite A, B, and C grades lies in whether the jadeite has undergone “enhancement treatments” that affect its physical structure and chemical composition.

  • A-grade jadeite is natural jadeite without any filling or dyeing treatments.

  • B-grade jadeite has been treated with strong acid soaking, impurity removal, and epoxy resin filling.

  • C-grade jadeite is B-grade jadeite that has additionally been dyed.


For laypersons, identification should start with visual inspection, tactile experience, and sound testing, and ultimately rely on authoritative certification.

Detailed Analysis: Exploring the Mystery of Jadeite’s “Identity”

Jadeite, known as the “king of jade,” derives its value not only from rarity and beauty but also from its unique natural physical and chemical properties. However, the market is flooded with jadeite treated to varying degrees, giving rise to the classification of A, B, and C grades.

1. A-grade Jadeite: The Natural Beauty and Foundation of Value

  • Definition: A-grade jadeite refers to jadeite that has not undergone any artificial chemical treatment. Its internal structure, mineral composition, and physical properties remain in their natural state. It may have undergone traditional physical enhancements such as polishing or waxing (limited to the surface without penetrating the interior), which do not alter the jadeite’s essence.

  • Characteristics: Texture can be fine or coarse, structure is dense, with a warm luster exhibiting glassy or oily sheen. Colors are naturally distributed with “color roots” and smooth transitions. When tapped, the sound is crisp and pleasant.

  • Value: Holds collectible and investment value, with price influenced by factors such as texture, translucency, color, and craftsmanship.


2. B-grade Jadeite: Acid Washing and Resin Filling, Structural Damage

  • Definition: B-grade jadeite is treated by soaking in strong acid. The acid corrodes impurities and some minerals inside the jadeite, loosening its structure. To compensate for this structural damage, epoxy resin or other polymer fillers are injected to consolidate and enhance transparency and gloss.

  • Characteristics:

- Luster: Surface often shows resin-like gloss, lacking the glassy sheen of A-grade, appearing “plastic-like” or “resinous.”
- Structure: Under magnification, acid-etched web-like patterns are visible—these are corrosion marks inside the jadeite—or filler material can be seen in cracks. Bubbles may be visible inside.
- Color: Colors may be vivid but often superficial, lacking “color roots” and natural distribution.
- Tactile: Density is relatively low, feeling lighter.
- Sound: Dull and muted, lacking the crispness of A-grade.
  • Value: The physical structure is compromised; stability is poor. Over time, B-grade jadeite may yellow, darken, or lose luster. It has little to no collectible value and limited wearability.


3. C-grade Jadeite: Artificial Dyeing, Over-Decoration

  • Definition: C-grade jadeite is dyed, typically based on B-grade or lower-quality A-grade jadeite, to present bright colors. Dyes are usually organic or inorganic pigments that penetrate the jadeite through heating or high pressure.

  • Characteristics:

- Color: Colors are overly bright and uniform, lacking depth and “color roots.” Dye tends to accumulate in cracks or between grains, showing web-like or thread-like patterns. Some C-grade jadeite may lose color when wiped with an alcohol-soaked cotton swab.
- Luster: May also show resin-like gloss or appear dull due to dye effects.
- UV Fluorescence: Some dyes fluoresce under ultraviolet light.
  • Value: C-grade jadeite is entirely artificially enhanced, essentially masking inferior jadeite. It has no collectible value and may cause skin irritation when worn.


Specific Cases and Market Data

In the late 1980s and early 1990s, B and C-grade jadeite flooded the market, especially in Southeast Asia. At that time, unscrupulous dealers exploited consumers’ lack of jadeite knowledge by passing off B-grade jadeite as A-grade at high prices. Industry statistics indicate that in some low-end markets, B and C-grade jadeite circulation once exceeded 50% of A-grade. For example, a “brick material” jadeite (very poor quality, worth only a few hundred yuan) could be acid-washed, resin-filled, and dyed, then packaged as a “high-grade” piece worth thousands or even tens of thousands of yuan, yielding profit margins of thousands of times. This severely disrupted market order and damaged the jadeite industry’s reputation.

In recent years, with improved consumer knowledge and stricter national gemstone identification standards, the market share of B and C-grade jadeite has declined but remains non-negligible. For instance, at some tourist spots or small jewelry shops, B and C-grade jadeite may still be passed off as A-grade. Therefore, mastering identification knowledge is crucial.

How Can Laypersons Distinguish A, B, and C Grades? — Practical Identification Tips

For non-professionals, the following methods can help preliminary judgment:

  • Observe the luster: A-grade jadeite typically has glassy or oily luster, with a smooth surface and clear reflections. B-grade often shows resin or waxy luster, with blurred reflections and a plastic feel. C-grade luster may appear dull or lifeless.


  • Examine the color: A-grade colors are natural, with color roots and uneven distribution, showing depth and variation. B-grade colors may appear “floating,” superficial, and lack color roots. C-grade colors are overly bright and uniform, often concentrated in cracks.


  • Check the structure: Using a 10x loupe, A-grade jadeite shows tightly interwoven internal structure with visible mineral crystals. B-grade shows acid-etched web patterns (“spider web”) or bubbles in filler material. C-grade reveals dye penetration along cracks or between grains.


  • Listen to the sound: Hang the jadeite on a thin string and gently tap it with a hard object (coin or another jadeite). A-grade produces a crisp, metallic sound. B-grade sounds dull, like tapping plastic. C-grade also tends to sound muted.


  • Feel the texture: A-grade feels cool and heavy. B-grade tends to be lighter due to lower density and may feel slightly sticky on the surface.


  • Check the certificate: This is the most reliable method. Always request a certificate from a nationally recognized gemological institute (such as NGTC, GIC) when purchasing jadeite. The certificate will clearly state “Natural Jadeite A-grade” or “Treated Jadeite,” with test data and photos. Be cautious if there is no certificate or if the certificate lacks complete information.


Summary and Recommendations

Distinguishing jadeite A, B, and C grades is fundamental to understanding jadeite’s value system. A-grade is a natural gift, carrying collectible and heritage value; B and C grades are artificially altered, with significantly reduced value and often no practical wearability. For ordinary consumers, identifying jadeite is not easy and requires experience and professional knowledge.

My recommendations are:

  • Learn the basics: Understand jadeite’s fundamental characteristics and identification methods.

  • Look more, buy less: Observe and compare extensively before purchasing to develop discernment.

  • Choose reputable dealers: Buy from jewelry stores with good reputation and credentials.

  • Request certification: Ensure every piece of jadeite purchased comes with a certificate from an authoritative gemological institute.

  • Avoid bargains: Market rules dictate “you get what you pay for.” Jadeite priced far below market value often has issues.


Remember, buying jadeite is an investment and a cultural heritage. Choose carefully to acquire truly beautiful jade.