Jade Treatments: The A, B and C Grades Explained

What the Grades Actually Mean

The A, B and C system comes from Chinese trade practice rather than from a laboratory standard, and that origin explains most of the confusion around it.

Grade A means the stone kept its natural colour and structure, apart from light waxing on the surface.

Bleaching followed by polymer impregnation produces grade B, which improves transparency and removes brown tones.

Dye produces grade C. Run both processes and you get the material labelled B plus C, the most common treated stone in the bead trade.

Every grade still describes jadeite or nephrite. Jade Imitations covers the separate problem of other materials sold as jade.

Before any of that matters, the species has to be right, and What Is Jade covers jadeite and nephrite in full.

Bleaching: What It Removes

Weathered jadeite often carries brown or yellow tones near the surface, and bleaching removes them.

The process uses acid, which dissolves some of the iron staining and opens the grain boundaries at the same time.

The stone comes out paler and cleaner, and also weaker. Bleaching enlarges the spaces between crystals, which is why the next step matters.

A bleached stone that stays unfilled feels dry and looks chalky. It also collects dirt faster, because the open structure absorbs whatever sits on the surface.

Whether the material justifies that work depends on the species, and Jadeite and Nephrite explains why bleaching concentrates in jadeite.

Polymer Filling: What It Adds

Resin fills the spaces that acid opened, and the stone becomes more transparent and more stable.

This is the step that turns grade B into something that looks close to grade A in a photograph.

The filling is not permanent. Heat, sunlight and time degrade the resin, and a filled stone can turn cloudy or patchy after several years of wear.

That is the honest reason to price B material lower. The buyer is renting the look rather than owning it.

Our guide to Jade Care covers what heat and cleaning do to filled stone.

Dyeing: Colour That Was Not There

Grade C stone received colour it never had, and the dye sits in the same open spaces that bleaching created.

Dye concentrates along cracks and grain boundaries, so the colour looks darker in fissures than in the body under magnification.

Purple and vivid green are the most common targets, because those colours command the highest prices.

Dye fades. Sunlight accelerates it, and the edges of a piece usually lighten first.

What dye tries to imitate is a natural colour that took trace elements millions of years to produce, and no process compresses that.

Waxing: The Treatment Nobody Penalises

Light waxing is traditional, and it counts as grade A in every market that uses the system.

The wax fills microscopic surface pits and gives the stone its final polish. It does not change colour or structure.

This matters because sellers sometimes call waxing a treatment to justify a lower grade, and buyers sometimes treat waxing as a red flag. Neither position holds.

A waxed stone behaves normally, needs no special care, and stays grade A.

How the Grades Affect Price

The gap between grades is large and consistent, and it follows the amount of natural material the buyer actually gets.

Grade	What was done	Typical price position
A	Nothing beyond waxing	Reference price, the highest of the three
B	Bleached and polymer filled	Often 30 to 60 percent below A
C	Dyed, sometimes also bleached	Usually the lowest tier, often half or less
B plus C	Both processes	Lowest in most markets

Percentages vary by material and by seller, so treat them as orientation rather than as a rule.

Most of what reaches retail sits between 150 and 800 dollars for jadeite, and our Jade Bracelets listings state the grade beside each stone.

The numbers behind untreated stone, including what colour and size do to a price, sit in What Jade Is Worth.

Why the Grades Are Not a Lab Standard

A laboratory report describes what testing found. It does not issue an A, B or C label, because those letters belong to trade convention.

A report will state that a stone is jadeite or nephrite, and it may note polymer or dye. The grade follows from those findings rather than replacing them.

This causes real problems at the counter. Two sellers can describe the same stone differently, and neither is lying in a legal sense.

Ask for the findings, not for the letter. The findings are testable, and the letter is an interpretation.

How Treatment Is Detected

Detection ranges from obvious to laboratory-only, and the method follows the process.

• Dye: colour concentration along cracks, visible under a loupe or a fibre-optic light.
• Polymer: a slightly plastic sheen, a duller sound when tapped, and a faint blue-white fluorescence under long-wave ultraviolet.
• Bleaching: a dry, chalky surface in unfinished pieces, usually combined with the signs of filling.
• Wax: no test needed, since waxing carries no consequence.

Ultraviolet light is the most useful single tool for filling, because most resins fluoresce and untreated jadeite usually does not.

A laboratory adds infrared spectroscopy, which identifies polymer reliably even when the surface looks clean.

Treatment and Durability

Filled and dyed stones need more care than untreated ones, and the difference shows over years rather than weeks.

Heat is the main enemy of polymer. A filled bangle left in a hot car or worn in a sauna can turn cloudy.

Ultrasonic and steam cleaners are out for any filled piece, and harsh detergents are out as well.

Dye reacts to sunlight and to sweat, and a dyed strand worn daily will look different within a couple of years.

Untreated jade tolerates all of that, which is part of what the premium buys.

What to Ask Before Buying

Four questions cover the treatment side of any purchase.

• Is the colour natural?
• Has the stone had polymer or dye?
• Does the price reflect the grade?
• Will the seller put the answer in writing?

The last question matters most. A written answer creates a record, and a record changes how a dispute gets settled.

Sellers who answer all four clearly and price accordingly are usually reliable. Sellers who dodge the second question are not selling grade A, whatever the listing claims.

The broader testing sequence, including what to check first, sits in how to tell if jade is real.

Treatment by Species

Treatment practice follows species, because the two behave differently in acid.

Jadeite takes bleaching well, since its granular structure survives the process once resin fills the gaps. Most B and C material on the market is jadeite.

Nephrite rarely goes through the same route. Its fibrous structure responds badly to acid, and the result loses the toughness that makes nephrite worth owning.

Serpentine imitations, by contrast, receive dye constantly, and that is where many buyers first meet the word treated.

Species therefore shapes what a grade means. A treated nephrite piece is unusual enough to warrant a second look.

When Buying Treated Jade Makes Sense

Treated stone is not automatically a bad purchase, and pretending otherwise pushes buyers toward worse decisions.

A grade B bangle at a fair price gives someone the look of translucent jadeite for a fraction of the untreated cost, and it will hold up for years with reasonable care.

The problem starts when treated material sells at untreated prices. That is a pricing failure rather than a material one.

Buy treated deliberately, price it as treated, and accept that the look has a service life. Buy untreated when the point is to own something that does not change.

Either way, the stone still needs the checks in the next section, because grade and species are separate questions.

Treatment and the Rough Stone

Treatment decisions start before cutting, because a cutter can see which pieces will need help.

Rough with heavy surface staining often goes to bleaching, while rough with pale but sound structure may only need wax.

That calculation shapes the whole market. Large volumes of low-grade rough become B and C material, and the small proportion of clean rough becomes grade A.

The economics of that sorting, from boulder to slab, sit in Raw Jade.

Frequently Asked Questions

Is grade A jade the best quality?

Not exactly. Grade A means untreated, so it describes the process rather than the quality. A grade A stone can still be pale, opaque and cheap, while a beautifully coloured grade B piece may cost more.

Does grade B jade change over time?

Yes. The polymer degrades with heat, sunlight and age, and a filled stone can turn cloudy or patchy after several years of daily wear.

Is dyed jade still real jade?

Yes. Grade C describes jadeite or nephrite that received dye. The material is real, the colour is not natural, and the price should reflect that.

Can waxing make jade grade B?

No. Light surface waxing is traditional finishing and stays grade A. Only bleaching, polymer filling or dyeing move a stone out of grade A.

Grade definitions here follow common trade usage in Chinese and international markets. Laboratories report findings rather than grades, and any specific stone should be assessed by testing rather than by a seller’s label.

Browse the full Jade Collection at Destiny Secret.