Introduction
If you have ever shopped for jadeite, you have almost certainly run into a string of letters: Type A, Type B, Type C, and occasionally a confusing hybrid like B+C. These labels are not marketing fluff, and they are not a ranking of beauty. They describe one thing above all else: whether the stone has been chemically treated, and if so, how. For a buyer, that single fact affects durability, appearance over time, resale value, and how much you should reasonably expect to pay.
This matters because jadeite is one of the few gemstones where a natural, untreated stone and a treated one can look nearly identical on a shelf — yet behave very differently over years of wear. A treated stone may look vivid today and fade, dry out, or discolor later. Understanding the labels lets you ask better questions, read a lab report correctly, and avoid paying natural-jade prices for a treated stone.
In this article you will learn what each letter grade means, how treatments are actually carried out, why the terminology trips people up, and how to verify a claim before you buy. We will also cover the practical checks you can do yourself and the mistakes that catch even experienced collectors. If you want a shorter companion piece, our overview of jade grade A vs B vs C and what the letters really mean is a useful starting point.
Background / Key Concepts
Jade is an umbrella term covering two different minerals: nephrite and jadeite. Jadeite, the material most associated with the vivid green and lavender stones prized in Chinese jewelry, is the one usually graded with the A/B/C system. The grading letters were popularized by the trade to communicate treatment status quickly, and they have since become the common shorthand across the industry.
What the letters actually describe
The letters describe treatment, not quality tier. Type A means the stone is natural jadeite that has not been chemically bleached or dyed — only physical shaping and polishing are acceptable. Type B means the stone has been bleached and then impregnated with a polymer resin to improve clarity and stability. Type C means the stone has been dyed to alter or enhance its color. A stone can be both bleached and dyed, which is where the B+C label comes from.
Because the system is about treatment rather than beauty, a Type A stone is not automatically more attractive than a Type B stone. It is simply untreated. That distinction is central to value, because untreated jadeite is rarer and its color and texture are considered stable and natural. As one industry treatment guide explains, the types focus on the treatments used and how they may affect appearance, which is exactly the right way to read the label.
Why the system exists
Natural jadeite with strong color and good transparency is scarce, and demand has long outstripped supply. Treatments were developed to make lower-grade material look closer to the ideal. That is not automatically dishonest — treated jade can be attractive and affordable — but the problem arises when treated stones are sold as natural. The A/B/C system exists to make that distinction visible, provided the seller is honest and the buyer knows what to ask.
Color, clarity, and cut still matter
Once treatment status is settled, the classic quality factors still apply. Buyers commonly weigh color, clarity, and cut — sometimes called the three Cs of jadeite — alongside the grade. A Type A stone with dull color and heavy inclusions is still a modest stone. Grade tells you what the material is; the three Cs tell you how good that material is. Our guide to natural jadeite jewelry shows how these factors combine in finished pieces.
The Main Body
Type A: natural and untreated
Type A jadeite is the benchmark. It has been cut, carved, and polished, but not bleached, not resin-impregnated, and not dyed. Its color comes from the stone itself, and its internal texture — the fine grain, the way light moves through it — reflects natural formation. Because no polymer fills its pores, a Type A stone is generally more durable and its appearance is expected to remain stable over time.
Type A stones are also where the widest price range lives. A small, pale, heavily included Type A cabochon can be quite affordable, while a highly translucent Type A stone with strong color can command a premium. The key point is that “Type A” is a statement about treatment, not a guarantee of top quality. It should always be paired with a realistic look at color, clarity, and transparency.
Type B: bleached and polymer-treated
Type B jadeite has been chemically bleached to strip out unwanted brown or gray tones, then filled with a resin to restore transparency and strength. The result can be a stone that looks cleaner and more translucent than the rough material would naturally allow. The trade-off is stability. Over time, resin can degrade, and treated stones may become duller or show surface changes, particularly with heat, chemicals, or prolonged sun exposure.
Type B jade is not inherently worthless, and some buyers knowingly choose it for its look at a lower price. The essential rule is disclosure: it should be sold and priced as treated material, never represented as natural. If a seller cannot or will not confirm treatment status, treat that as a warning sign rather than a bargain.
Type C: dyed jadeite
Type C jadeite has had dye introduced to change or intensify its color. The dye typically sits in the spaces between mineral grains, which is also how it can be detected. Under magnification, dye may appear concentrated along grain boundaries or fractures, and in some stones it looks slightly uneven or unnatural compared with the way color naturally distributes. Color stability is the main concern: dyes can fade or shift, especially with exposure to light, heat, or solvents.
Because color is such a powerful driver of jade value, dyeing is one of the most common enhancements. A vivid, saturated green at a surprisingly low price deserves extra scrutiny. When in doubt, ask for a report from a recognized laboratory rather than relying on a photograph.
Type B+C and the confusing middle ground
Many treated stones are both bleached and dyed, which is why B+C appears so often. Some sellers also use informal or invented labels — occasionally even a “Type D” — which have no standard meaning in the trade. When you see terminology that does not match the established A, B, and C framework, slow down. The absence of a clear standard label is often a sign that the treatment status is being obscured rather than clarified.
How to verify what you are buying
The most reliable path is a report from an established gemological laboratory that states whether the stone is natural or treated. Reputable labs use instruments such as infrared spectroscopy to detect polymer resin and other treatments that the eye cannot catch. A seller who confidently offers documentation and welcomes independent verification is behaving the way a trustworthy seller should. For a step-by-step approach, see our guide on how to verify Type A jadeite with lab reports and tests.
It also helps to know how lighting affects what you see. Jadeite can look noticeably different under fluorescent versus incandescent light, and photographs are often taken under conditions that flatter color. Our explainer on jadeite under fluorescent vs incandescent light walks through what to look for so you are not surprised when a piece arrives.
Practical Tips
- Always ask directly whether a stone is Type A, B, C, or B+C, and get the answer in writing on the invoice or listing.
- Request a report from a recognized gemological laboratory for any significant purchase, and check that the report actually describes treatment status.
- Compare price against treatment status: a natural-grade price for a treated stone is the most common way buyers overpay.
- View the stone under more than one light source, since color and transparency can shift dramatically between lighting types.
- Examine the surface and interior with a loupe if you can; dye and resin sometimes leave visible clues along grain boundaries and fractures.
- Buy from sellers who explain treatments plainly and do not pressure you to decide quickly.
- Consider how you will wear the piece: treated stones may need more careful handling around heat, chemicals, and prolonged sun.
Common Mistakes to Avoid
- Assuming Type A means “best quality.” It means untreated, which is different from beautiful or valuable.
- Treating the letters as a beauty ranking rather than a treatment disclosure.
- Trusting a single flattering photograph instead of asking about lighting and treatment.
- Accepting vague terms like “natural-looking” or “enhanced” in place of a clear grade.
- Believing informal labels such as “Type D,” which have no standard meaning in the trade.
- Skipping documentation on a high-value purchase to save a little time or cost.
- Assuming a certificate alone settles everything — read what the report actually says about treatment.
Conclusion / Key Takeaways
The A, B, and C labels are a treatment system, not a quality score. Type A means natural, untreated jadeite. Type B means bleached and resin-impregnated. Type C means dyed. B+C means both treatments were applied. Once you understand that, the letters stop being mysterious and start being useful — they tell you what you are actually buying and how it is likely to behave over time.
Quality still comes down to the stone in front of you: color, clarity, transparency, and craftsmanship. A well-chosen Type A piece can be modest or magnificent depending on those factors, and a treated stone can be a reasonable purchase when it is honestly described and fairly priced. The goal is not to avoid treated jade at all costs, but to never pay natural-jade prices for treated material and never be surprised by what you own.
Before you commit, confirm the grade, ask for documentation, and look at the stone under more than one light. If you would like to explore natural jadeite pieces and see how these factors come together in finished jewelry, browse our jadeite pendants collection and compare how color and transparency read across different stones.
FAQ
Is Type A jade always better than Type B or Type C?
Not necessarily in appearance, but it is untreated, which makes it rarer and generally more stable and valuable. Type A describes treatment status, not beauty, so a Type A stone can still be modest in color or clarity.
What does Type B jade mean?
Type B jadeite has been chemically bleached to remove unwanted tones and then impregnated with polymer resin to improve clarity and stability. It should always be sold and priced as treated material.
How can I tell if jade is dyed?
Dye often concentrates along grain boundaries and fractures, which can be visible under magnification, and dyed color may look uneven or fade over time. A report from a recognized gemological laboratory is the most reliable confirmation.
Does a certificate guarantee my jade is natural?
A certificate is only as good as what it states. Read the report carefully to confirm it explicitly addresses treatment status, and buy from sellers who welcome independent verification.
