As a scholar deeply rooted in the cultural field on Zhihu, I am well aware of the unique position of jadeite, especially in the context of Chinese culture. It is not only a precious mineral but also a cultural symbol embodying aesthetics, beliefs, and wealth. However, the jadeite market is vast and authenticity can be difficult to discern. Distinguishing between "Type A, Type B, and Type C" jadeite is the first and most easily confused and exploited knowledge point for ordinary consumers entering jadeite identification. Today, I will provide a professional and in-depth analysis of the fundamental differences between these three types and offer a set of effective identification methods.

【Conclusion First】

Simply put, Type A jadeite is natural jadeite that has not undergone any chemical treatment; Type B jadeite has been soaked in strong acid and injected with resin; Type C jadeite is Type B jadeite that has been artificially dyed. Their fundamental difference lies in whether they have undergone destructive artificial optimization treatment and the impact of such treatment on the jadeite's structure and durability.

【Detailed Analysis: Peeling Back Layers from Essence to Appearance】

  • Type A Jadeite (Natural Jadeite):

* Definition and Essence: Type A jadeite refers to jadeite that has only undergone traditional physical processing such as cutting, carving, grinding, and polishing after being mined from Myanmar. Its internal structure, mineral composition, and color remain in their natural state. It has not been subjected to any chemical soaking, filling, or dyeing. Its "texture," "translucency," and "color" are all masterpieces of nature.
* Culture and Value: Type A jadeite is truly valuable for collection and inheritance. Its value is determined by its own texture (density of structure), translucency (transparency), color (richness, vibrancy, purity, and evenness of hue), craftsmanship, and other factors. High-quality Type A jadeite, such as imperial green glass jadeite, has repeatedly fetched sky-high prices in auction markets; for example, a "Zhaoyi Star" natural jadeite necklace sold for over 214 million Hong Kong dollars at Sotheby's Hong Kong Spring Sale in 2014.
* Market Characteristics: Prices vary greatly, ranging from hundreds of yuan to hundreds of millions of yuan. High-end Type A jadeite, such as imperial green glass jadeite, has repeatedly fetched sky-high prices in auction markets; for example, a "Zhaoyi Star" natural jadeite necklace sold for over 214 million Hong Kong dollars at Sotheby's Hong Kong Spring Sale in 2014.

  • Type B Jadeite (Bleached and Impregnated Jadeite):

* Definition and Essence: Type B jadeite refers to natural jadeite roughs with poor texture, loose structure, and many flaws that are soaked in strong acids (such as nitric acid, hydrofluoric acid, etc.) to remove internal impurities and dirty colors, and then injected with epoxy resin or other polymer materials for filling and solidification. This treatment severely damages the original crystal structure of the jadeite, making it porous, and the resin injection improves its transparency and luster.
* Culture and Value: The essence of Type B jadeite has changed; its internal structure is damaged, and its stability is poor. Over time, the resin will age, yellow, and fall off, causing the jadeite to lose its luster and even develop cracks. Therefore, Type B jadeite has no collection value, and its market value is far lower than that of Type A jadeite.
* Market Characteristics: Prices are relatively low, often a fraction or even a few tenths of the price of Type A jadeite with similar appearance. Some "good translucency" and "vibrant color" jadeite that is unusually cheap in the market is often suspected of being Type B. According to industry data, Type B jadeite accounts for a significant share of the low-end market and is highly deceptive.

  • Type C Jadeite (Dyed Jadeite):

* Definition and Essence: Type C jadeite is Type B jadeite that has been artificially dyed to present vibrant colors, masquerading as high-grade Type A jadeite. Dyes are usually chromium salts, organic dyes, etc., which penetrate into the cracks and porous structures of the jadeite. Sometimes, Type C jadeite may also be directly dyed from natural jadeite that has not been bleached but has poor color.
* Culture and Value: Type C jadeite not only has a damaged structure but also contains chemical dyes that may be harmful to the human body. Its color is unnatural and not durable, and it will fade and change color with wear and time. It has absolutely no collection value and may pose potential health risks to the wearer.
* Market Characteristics: Prices are extremely low, but because its colors are often very vivid and attractive, it can easily mislead inexperienced consumers. Jadeite with overly uniform, intensely vibrant, or even "bewitching" colors in the market requires high vigilance.

【How Can Ordinary People Distinguish? Practical Identification Techniques】

For ordinary consumers, mastering some simple and practical identification methods is crucial. Although ultimate authoritative identification requires professional instruments, the following points can help you make an initial judgment:

  • Observe Luster:

* Type A: Exhibits vitreous luster, with a bright, clear surface and sharp reflections.
* Type B: Surface luster is weaker, often appearing waxy or resinous, with dull, unsharp reflections. Sometimes, a "orange peel effect" or fine acid-etched mesh patterns can be seen on the surface.
* Type C: Luster is similar to Type B, often also waxy or resinous.

  • Observe Color:

* Type A: Color is natural, layered, with natural distribution of color roots and smooth transitions from light to dark. Even if it's full-colored, there will be subtle variations in shade.
* Type B: Color often appears "floating," not deep enough, lacking vitality. Sometimes, uneven color distribution, with "color spots" or "color blocks" aggregated, can be observed.
* Type C: Color is overly vivid, uniform, and even somewhat "gaudy." In cracks or porous structures, the color will appear particularly concentrated, distributed in a net-like or thread-like pattern. Under magnification, traces of dye penetration along cracks can sometimes be seen.

  • Observe Structure (with Magnifying Glass):

* Type A: Internal structure is compact, with visible fibrous intergrowth or granular structure, a smooth surface, and few cracks. If cracks are present, their edges are clear.
* Type B: The surface often has acid-etched mesh patterns, commonly known as "orange peel texture" or "spider web texture," which are traces left by strong acid corrosion. The internal structure is porous, with visible filled resin, and sometimes air bubbles. When illuminated from the side with a flashlight, the resinous parts will appear cloudy.
* Type C: In addition to the characteristics of Type B, dye accumulation in cracks and unnatural color distribution can be observed.

  • Listen to Sound (for large items like bangles only):

* Type A: When two Type A bangles are gently tapped together, they produce a crisp, melodious "steel sound."
* Type B/C: When tapped, the sound is dull and muted, lacking crispness, because the internal structure is damaged, and the resin absorbs vibrations.

  • Feel:

* Type A: Higher density, feels noticeably heavy in hand, and has a cool touch.
* Type B/C: Due to resin filling, the density is relatively lower, feeling lighter in hand, and the touch is not as cool as Type A.

【Cases and Data】

In the late 1980s and early 1990s, Type B and Type C jadeite techniques became rampant in the market, once causing consumers to lose confidence in the jadeite market. According to a certain jewelry appraisal institution, before 2000, the proportion of Type B and Type C jadeite among the jadeite it appraised once reached over 30%. With the improvement of national standards for jewelry and jade identification and the increase in consumer knowledge, this proportion has decreased, but Type B and Type C jadeite continue to emerge, especially on online platforms and tourist shopping spots, where consumers still need to be vigilant.

【Practical Advice】

* Choose Reputable Merchants: When purchasing jadeite, always choose jewelry stores or brands with a good reputation and long operating history.
* Request Appraisal Certificates: For higher-priced jadeite, always request an appraisal certificate issued by a nationally recognized authoritative jewelry and jade appraisal institution (such as NGTC National Gemstone Testing Center, GIC China University of Geosciences Gem Testing Center, etc.). The certificate will clearly state "Natural Jadeite (Type A)" or "Jadeite (Treated)."
* Observe More, Buy Less; Learn More, Ask More: Before purchasing, learn more about jadeite, observe physical objects, consult professionals, and never blindly believe a merchant's one-sided claims.
* Beware of Prices: If you encounter a "good deal" with a price far below market value, be highly vigilant; there's no such thing as a free lunch.

【Summary】

Distinguishing between Type A, Type B, and Type C jadeite is fundamental to understanding the jadeite value system. Type A jadeite is a treasure bestowed by nature, embodying culture and aesthetics; Type B and Type C jadeite are products of artificial intervention, with greatly diminished value and durability. As consumers, we must not only learn to identify their physical characteristics but also understand the cultural significance and market ethics behind them. Only by doing so can we find the truly natural and unadorned beauty that belongs to us in the dazzling world of jadeite, and pass it down through generations as a cultural imprint of our family.