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

As a professional with over a decade of experience in the jewelry industry, I deeply understand the allure and complexity of jadeite. In the jadeite market, the most frequently heard distinctions are 'Type A,' 'Type B,' and 'Type C.' These are not just simple letter codes; they are core indicators that determine the value, durability, and wearing safety of jadeite. My core conclusion is: Type A jadeite is natural and untreated, Type B jadeite is acid-washed and polymer-filled, and Type C jadeite is artificially dyed. For ordinary consumers, the most reliable method of identification is to rely on certificates issued by authoritative gemological laboratories.

I. In-depth Analysis of the Fundamental Differences between Type A, Type B, and Type C Jadeite

Understanding the essence of these three types of jadeite is the first step in distinguishing them.

1. Type A Jadeite: A Gift from Nature, the Cornerstone of Value

* Definition and Characteristics: Type A jadeite refers to jadeite that has not undergone any chemical treatment, whose structure has not been damaged, and whose color and transparency are naturally formed. It only undergoes traditional physical processing such as cutting, grinding, and polishing, retaining the most original and pure physical and chemical properties of jadeite. Its internal structure is dense, with tightly interlocked crystals, exhibiting natural 'fly's wings' (翠性) and 'orange peel effect' (橘皮效应).
* Value Manifestation: It commands the highest market value and has potential for preservation and appreciation. Its natural color, warm luster, and fine texture make it the preferred choice for collection and wearing. For example, a high-ice-grade imperial green Type A jadeite bangle once fetched tens of millions of Hong Kong dollars at a Sotheby's spring auction in 2020, fully demonstrating the rarity and market recognition of Type A jadeite.
* Durability and Safety: The structure is stable, not prone to discoloration or cracking, and can be passed down through generations. It is harmless to the human body and can be worn with confidence.

2. Type B Jadeite: Acid-Washed and Polymer-Filled 'Beautification,' a Value Trap

* Definition and Characteristics: Type B jadeite refers to jadeite that has been soaked in strong acid to remove impurities (such as yellowish-brown iron substances) and optimized in structure (filled with epoxy resin or polymer). The acid washing process damages the internal crystal structure of the jadeite, making it porous, thus requiring resin filling to improve transparency and luster. Its surface often shows acid-etched mesh patterns or 'spider web-like' cracks. Its luster is not as natural as Type A, and over time, it will 'lose water,' becoming yellowish and dull.
* Value Manifestation: Its market value is extremely low, with almost no potential for preservation or appreciation. Its price is usually a fraction of that of a Type A jadeite of comparable quality. According to data from the Gemological Association of China (GAC), the circulation of Type B jadeite in the market once exceeded 30%, severely disrupting market order.
* Durability and Safety: The structure is unstable; the resin will age, yellow, and peel off, causing the jadeite to lose its luster or even crack. The filled epoxy resin may contain harmful substances, posing potential health risks with long-term wear.

3. Type C Jadeite: Artificially Dyed 'Disguise,' a Means of Deception

* Definition and Characteristics: Type C jadeite refers to jadeite (either Type B or inferior Type A) that has been artificially dyed (e.g., with chromium salts, organic dyes) to penetrate its interior, giving it a vibrant color. Its color distribution is unnatural, often appearing filamentous, reticulated, or patchy. Under magnification, dyes can be seen distributed along crystal interstices, and the color often appears to float on the surface. Under UV light, Type C jadeite often fluoresces.
* Value Manifestation: It has no value whatsoever and is a typical fraudulent commodity. Its price is usually the lowest, but it is often sold by unscrupulous merchants as high-grade Type A jadeite.
* Durability and Safety: Dyes will fade over time and may even stain the skin. Some dyes may contain heavy metals or other harmful chemical components, posing greater health risks to the human body.

II. How Can Ordinary People Distinguish Type A, Type B, and Type C Jadeite?

For non-professionals, the following methods can serve as a basis for preliminary judgment, but ultimately, professional appraisal is still required.

1. Observe Luster and Transparency:
* Type A: Exhibits vitreous or sub-vitreous luster, which is natural, clear, and vibrant. Transparency ranges from opaque to glass-like, but regardless of transparency, its internal structure appears clear and layered.
* Type B: Surface luster often appears 'waxy' or 'resinous,' looking dull and unnatural. Transparency may be high, but the interior often has a blurry 'plastic feel,' or fine acid-etched mesh patterns can be observed under strong light.
* Type C: Color is overly vivid and uniform, lacking the natural color roots and tonal variations of natural jadeite. Luster may be similar to Type B, or even worse.

2. Touch and Feel:
* Type A: Feels cool, delicate, smooth, and has a substantial weight in hand.
* Type B: May not feel as cool as Type A, sometimes feeling slightly 'rough' or 'sticky' because resin has lower thermal conductivity than natural minerals.

3. Sound Test (for bangles and large items only):
* Type A: When gently tapped with a hard object (such as a coin or another jadeite bangle), it produces a clear, melodious 'steel sound.'
* Type B: The tapping sound is dull and short, lacking the crispness of Type A.

4. Observe Color Distribution:
* Type A: Color distribution is natural, with color roots, and color transitions are natural with varying depths.
* Type C: Color is overly uniform, or appears filamentous, reticulated, or patchy, lacking color roots, and the color floats on the surface, appearing unnatural.

5. UV Fluorescence Test (Auxiliary Method):
* Type A: Usually no fluorescence or weak fluorescence (a very small number of natural jadeite may have weak fluorescence).
* Type B: Due to the filling of epoxy resin, it often emits medium to strong blue or yellowish-green fluorescence under UV light. This is an important indicator for identifying Type B jadeite.
* Type C: If the dye contains fluorescent substances, it will also fluoresce.

6. The Most Reliable Method: Authoritative Appraisal Certificate!

Given the increasingly sophisticated methods of jadeite counterfeiting, it is difficult for ordinary consumers to make accurate judgments based solely on eyesight and experience. The safest and most professional approach is to request a gemological appraisal certificate issued by a nationally recognized authoritative gemological laboratory (e.g., National Gemstone Testing Center GIC, China University of Geosciences Gem Testing Center GIC, Guangdong Gemstone and Precious Metal Testing Center GTC, etc.).

* Certificate Content: The certificate will clearly state 'Jadeite (Type A)' or 'Jadeite (Treated).' If it states 'Treated,' it may be Type B or Type C. The certificate will also list professional data such as refractive index, density, absorption spectrum, and magnification characteristics. For example, a GIC certificate will clearly state 'Natural Jadeite (Type A)' and include detailed test data and photos. If the certificate states 'Jadeite (Enhanced/Treated)' or 'Jadeite (Type B/C),' immediate caution should be exercised.
* Verify Authenticity: After receiving the certificate, be sure to verify its authenticity through the official website or QR code provided on the certificate.

III. Market Cases and Industry Experience Sharing

I once encountered a case where a customer purchased a 'ice-grade floating flower' bangle at a tourist spot at a high price, with the merchant confidently assuring it was Type A. However, when she brought it to our store for re-examination, under UV light, the bangle emitted strong blue fluorescence, and acid-etched mesh patterns and resin filling marks were clearly visible under magnification. It was ultimately identified as Type B. The actual value of this bangle was probably less than one-tenth of her purchase price. This case profoundly illustrates the risk of blindly trusting a merchant's verbal promises without professional knowledge.

Industry Data: Despite increasing national efforts to combat jadeite counterfeiting, the circulation of Type B and Type C jadeite in the market still exists. Especially in some unregulated tourist shopping spots and live-streaming sales platforms, consumers are more likely to buy problematic jadeite. According to the 2022 consumer association's jewelry complaint report, among jadeite-related complaints, issues concerning authenticity and material accounted for over 40%, with Type B and Type C jadeite being passed off as Type A being the main problem.

IV. Practical Advice and Summary

  • Choose Reputable Channels: Always purchase jadeite from reputable and qualified jewelry stores, avoiding tourist spots, unknown small shops, or dubious live-streaming channels.

  • Request and Verify Certificates: When purchasing, always request an appraisal certificate issued by an authoritative institution, carefully check if the certificate content matches the actual item, and verify the certificate's authenticity through official channels.

  • Learn Basic Knowledge: Understanding some basic jadeite identification knowledge can help with preliminary judgment, but do not be overly confident.

  • Maintain Rational Consumption: Jadeite is expensive; do not be greedy for cheap prices. If the price of a piece of jadeite is significantly lower than the market rate, it is likely Type B or Type C.

  • Look More, Buy Less, Learn More: Collecting jadeite is a long-term process. Look more, learn more, compare more, and accumulate experience to avoid 'falling into traps.'


In conclusion, distinguishing between Type A, Type B, and Type C jadeite is core knowledge that consumers must understand when purchasing jadeite. Type A is a natural treasure, Type B is chemically treated, and Type C is dyed. Their value, durability, and safety differ greatly. As ordinary consumers, the wisest approach is to rely on professional appraisal certificates and choose reputable merchants to ensure that you are purchasing genuine natural jadeite, allowing this gift from nature to bring you true beauty and value.

I hope my answer helps everyone better understand and identify jadeite. May you all find your desired Type A jadeite!