What are the differences between Type A, Type B, and Type C jadeite? How can ordinary people distinguish them?

Conclusion First: Type A jadeite is natural, untreated, and holds potential for value preservation and appreciation. Type B jadeite is treated with strong acid and filled with resin, resulting in damaged structure and extremely low value. Type C jadeite is dyed and counterfeit, with no collection value. Ordinary people can distinguish them by comprehensively judging certificates, luster, structure, sound, and price, but the most reliable way is to seek professional appraisal.

Detailed Analysis: The Essence and Market Impact of Type A, B, and C Jadeite

As an analyst who has long focused on the jewelry and jade investment market, I deeply understand that distinguishing genuine jadeite from fakes is the biggest challenge faced by ordinary consumers and even some novice investors. The classification of Type A, B, and C jadeite is not simply about quality, but directly addresses its natural attributes and market value.

  • Type A Jadeite (Natural Jadeite):

* Definition: Refers to natural jadeite that has not undergone any chemical treatment, only physical processing (such as cutting, polishing, carving). Its internal structure, color, transparency, etc., are all naturally formed, retaining the original physical and chemical properties of jadeite.
* Characteristics: The surface exhibits a vitreous luster, the internal structure is compact, and natural flaws such as cotton, veins, and cracks are visible. The color is naturally distributed, with color roots and natural transitions. When tapped, it produces a clear and pleasant sound.
* Market Value and Investment Potential: Type A jadeite is the only category with collection and investment value. Its value depends on factors such as 'zhong' (texture), 'shui' (transparency), 'se' (color), and 'gong' (craftsmanship). High-quality Type A jadeite, especially rare varieties like high-ice type, glass type, and imperial green, has shown astonishing appreciation capabilities over the past few decades. For example, in the 2014 Sotheby's Hong Kong Spring Auction, a natural jadeite bead necklace named "Zhaoyi Star" was sold for HKD 106 million, demonstrating the rarity and market recognition of top-grade Type A jadeite.

  • Type B Jadeite (Bleached and Filled Jadeite):

* Definition: Jadeite that has been soaked in strong acid to bleach and remove impurities and dirty colors, and then filled with organic resins like epoxy resin into its cracks and loose structures to improve its transparency and clarity. This treatment is an irreversible chemical damage.
* Characteristics: The surface luster is resinous or waxy, lacking the sharp brilliance of vitreous luster. The internal structure becomes porous due to strong acid corrosion, and the filled glue can be seen as "spiderweb-like" or "acid-etched network patterns" under a magnifying glass. The color is dull and lacks vitality. When tapped, it produces a dull sound.
* Market Impact: The emergence of Type B jadeite has greatly disrupted market order. Its initial appearance may be similar to Type A, but due to the destruction of its internal structure, its stability is extremely poor. After wearing for a period, it will "lose water," become yellow, dry, dull in luster, and even develop cracks. Its value is negligible, possessing no collection or investment value.

  • Type C Jadeite (Dyed Jadeite):

* Definition: Refers to jadeite that has been artificially dyed, transforming colorless or light-colored jadeite into green or other colors. Dyes are usually organic, permeated into the jadeite through heating or high pressure.
* Characteristics: The color floats on the surface, is unnatural, often overly vibrant or dull. Under a magnifying glass, dyes can be seen concentrated along cracks or intergranular spaces, appearing as network or filamentous distributions. Wiping with a cotton swab dipped in alcohol or acetone may sometimes show color fading (but not all Type C jadeite will fade). Tapping sounds usually do not differ significantly from Type A or B, requiring judgment based on other characteristics.
* Market Impact: Type C jadeite is a completely fraudulent product, its value limited to material cost and processing fees. Wearing Type C jadeite may pose potential health risks, as some dyes contain harmful chemicals. It also possesses no collection or investment value.

How Can Ordinary People Distinguish? Practical Identification Guide

For non-professionals, the following points can serve as preliminary judgment criteria, but remember, a professional appraisal certificate is the ultimate guarantee.

  • Check the Certificate: This is the most direct and reliable method. When purchasing jadeite, always request an appraisal certificate issued by a nationally recognized jewelry and jade appraisal institution (such as NGTC, CUG, China Gem Lab, etc.). The certificate will clearly state "Natural Jadeite" or "Jadeite (Type A)". Type B and C jadeite will be marked "Bleached and Filled Jadeite" or "Dyed Jadeite."


  • Observe the Luster:

* Type A: Exhibits a vitreous luster, the surface is bright, clear, with a sense of "rigidity" or "fluorescence."
* Type B: Surface luster is weaker, appearing waxy or resinous, looking dull and not transparent.
* Type C: Luster may be similar to Type A or B, requiring judgment based on other characteristics.

  • Examine the Structure (with a magnifying glass):

* Type A: Internal structure is compact, with visible natural fibrous intergrowth structure or tiny mineral particles. Natural flaws like cotton, veins, and cracks are naturally distributed.
* Type B: Under a magnifying glass, distinct "acid-etched network patterns" are visible, which are network structures left after strong acid corrosion, along with filled glue. Sometimes air bubbles can be seen.
* Type C: Under a magnifying glass, dyes can be seen concentrated along cracks or intergranular spaces, appearing as filamentous, network, or dot-like distributions.

  • Listen to the Sound (for reference only):

* Type A: Gently tap with a hard object (like a coin or another piece of jadeite), the sound is crisp and melodious.
* Type B: Tapping sound is dull and hoarse.
* Type C: Sound may be similar to Type A, not used as a primary judgment criterion.

  • Observe the Color:

* Type A: Color is natural, with color roots, evenly distributed or appearing as filamentous or clustered, with natural transitions and layers.
* Type B: Color often appears white, yellow, or overly uniform, lacking vitality.
* Type C: Color is overly vibrant, floats on the surface, is unnatural, and sometimes dyes can be seen concentrated in cracks. When illuminated with a strong flashlight from the side, the color will appear unnatural.

  • Feel and Density:

* Type A: Feels cool to the touch, has a higher density, and feels substantial.
* Type B: Density is reduced due to glue filling, may feel slightly lighter.
* Type C: Density is close to Type A, tactile difference is not obvious.

  • Price: This is a very important reference indicator. If a piece of jadeite looks very good in color and transparency but the price is unbelievably low, it is highly likely to be Type B or C. For example, a glass-type imperial green bangle, whose market price can be millions or even higher, if someone sells it for tens of thousands or even less, it is almost certainly fake.


Case Studies and Data

According to data from the Gemological Association of China (GAC), in recent years, with increased consumer awareness of jadeite and advancements in appraisal technology, the direct sales proportion of Type B and C jadeite has decreased, but unscrupulous merchants still create confusion through various channels. Especially in some tourist attractions or online live streaming platforms, counterfeit and inferior products remain rampant.

* Case: In 2023, a consumer purchased an "ice-type floating flower bangle" for 18,000 yuan from a live stream, which was later identified by a professional institution as B+C type (i.e., bleached, filled, and dyed jadeite), with an actual value of less than 100 yuan. This fully illustrates the risks of relying solely on visual inspection and seller descriptions.
* Data: In 2022, an authoritative appraisal institution handled jadeite appraisal samples, and the detection rate of Type B and C jadeite was still as high as about 15%, including many "fine products" purchased at high prices by consumers.

Summary and Recommendations

Jadeite appraisal is a specialized field requiring professional knowledge and rich experience. For ordinary consumers, the wisest approach is:

  • Choose reputable merchants: Prioritize jewelry retailers with established brands, good reputation, and physical stores.

  • Request and verify appraisal certificates: Ensure the certificate is issued by a national authority and can be verified for authenticity through official websites or phone calls.

  • Learn basic knowledge: Understand the basic characteristics of Type A, B, and C jadeite to improve your discernment ability.

  • Consume rationally, avoid being greedy for small gains: The value of jadeite is directly proportional to its quality; an excessively low price often implies risk.

  • Seek professional help when in doubt: If necessary, send the purchased jadeite to a third-party authoritative institution for re-examination.


Investing in jadeite, like investing in other rare assets, requires a rigorous attitude and professional judgment. Staying away from Type B and C jadeite is essential to truly enjoy the natural beauty of jadeite and its inherent cultural and investment value.