Agarwood raw material identification: how to distinguish living formation, dead-tree formation and processed material

Key points

• Living formation: harvested from a living tree, the aroma is sharp and intense with a pungent note, often carrying a raw-wood scent; dead-tree formation: dead wood naturally aged for many years, the aroma is mellow, thick, sweet and cool.
• Other common formation types include insect-bored, shell, board-top and iron-cake, which classify agarwood by "part and form" and are not on the same dimension as living formation versus dead-tree formation.
• The three brothers of processed material: treated material (high polishing with oil penetration), compressed material (jokingly called "pangdahai" in the trade—it swells when soaked in water), and line-drawn material (artificially traced patterns).
• The core actions in raw material identification: examine penetration on the cross-section, smell the true scent when heated, and soak in water to observe deformation.
• Wild populations of the agarwood genus are listed in CITES Appendix II, and cross-border trade requires a permit certificate—especially in raw material transactions, always ask about the source.

I. Living formation and dead-tree formation: one character apart, two worlds

The common descriptions of living formation and dead-tree formation in the trade are:Living formationis the agarwood formed while the Aquilaria sinensis tree is still alive, after it is injured by knife cuts, insect borers, wind breakage or similar; the tree is still living when the agarwood is harvested;Dead-tree formationis when, after agarwood formation, the tree dies and the fragrant material falls into soil or becomes soaked in damp ground, undergoes natural aging for several years or even decades, and is then taken out from the soil or water.

This distinction directly affects three things:

Aroma.After long natural aging, the dry harshness in the wood dissipates and the fragrance becomes mellow, with sweetness and coolness blended together, often carrying a unique "earth agarwood" resonance—note that good earth agarwood scent is a clean, deep note, not a musty smell. The aroma of living formation is sharper and more intense with greater penetration, but it often carries a raw-wood pungency and needs burning to fully unfold.

Physical character.Dead-tree formation has mostly rotted outer bark, with a cross-section that is oily and full, and a texture that is "crumbly" yet holds the fragrance; living formation is relatively "stiff and raw," with a clear boundary between the agarwood-forming part and the healthy wood.

Price.For the same production area and the same oil content, dead-tree formation is usually more expensive than living formation—aging time is cost. The 2018 market report by People's Daily Online and the site's"Principles of Agarwood Formation"both give systematic explanations of formation methods and can be read together for comparison.

An easily confused point:Insect-hole, shell, board-head, and fallen pieces are classifications by 'resin formation part and form', which is not the same dimension as raw-resin and mature-resin.— Insect-hole can be either raw-resin or mature-resin. When buying raw materials, asking clearly 'how was the resin formed, and what was the tree's condition when harvested' is more professional than asking for a term.

2. Processed material 1: doctored material — the 'beauty filter' of agarwood wood

Doctored material plays on the one-character difference between 'agarwood wood' and 'agarwood'. The method is to high-speed polish agarwood wood with very little resin (trade jargon 'high polishing'), causing trace oils to seep out and gather on the surface, making it look oily and shiny. In People's Daily Online's 2018 article 'A Comprehensive View of Agarwood Collection', operator Hu Xiaopeng said directly: he has seen pure white wood polished black with rubber at high temperature, odorless, priced at several hundred yuan, and 'most still use agarwood wood with a bit of oil for high polishing... agarwood wood itself has no collection or investment value'.

Identification steps:

1. Check the cross-section: Cut it open or find a natural cross-section; the 'oil' of doctored material is only on the surface, the interior of the cross-section is light-colored wood, and the oil lines are clearly discontinuous.
2. Smell the natural scent: The surface has an oily smell, but the cross-section 'gives it away' immediately — a strong raw-wood smell, and the fragrance does not hold.
3. Handling test: After wearing it for a few days, once the surface floating oil is worn off, it quickly 'turns white' and the fragrance plummets.

3. Processed material 2: compressed material — the 'pangdahai' that swells when soaked in water

Compressed material is made by compressing resin and wood (or low-oil material plus oil paste) together under high pressure, increasing density to sinking-grade effect, and it also gives off a faint fragrance; to pursue the black color of high-grade agarwood, sometimes even asphalt is added to darken it. A 2018 People's Daily Online report records that the industry jokingly calls this material 'pangdahai' — it swells after soaking in water overnight. This material usually appears as wood blocks or hand pieces, rarely made into beads.

Identification steps:

1. Soak in water: Take a corner piece and soak it in warm water for several hours; if it swells, layers, and has floating oil slicks on the water surface, it can basically be determined.
2. Weigh and listen: Compressed material is dead heavy and sounds dull, lacking the warm moist feel of natural material.
3. Check the grain: High pressure deforms and blurs the grain, losing the clear layers of natural resin formation.

4. Processed material 3: line-drawn material — no matter how good the painting, it fears scraping

Line-drawn material is artificially drawing oil lines on the surface of white wood or low-oil material with tools. Nowadays the craft has upgraded to 'simulated oil line drawing' and 'low-temperature penetration', with highly realistic appearance — this is the industry trend named in a 2026 article by China Economic Net. On-site"A Comprehensive Guide to Types of Fake Agarwood"has a systematic breakdown of drawn-line material; here the shopkeeper emphasizes only two actions for raw material scenarios:

1. Scrape: lightly scrape the surface in an inconspicuous spot; drawn-line material reveals white wood once scraped—the oil lines are "stuck" on.
2. Check penetration: natural agarwood's oil penetrates deep into the wood; the cross-section, cracks, and pore walls all have corresponding structures; drawn-line material has only a "skin."

V. Four-step process for handling raw material

When you get a piece of raw material, go through it in this order:

1. Look at the outer skin and cross-section: the degree of decay of the outer skin, the direction and penetration depth of the oil lines in the cross-section, and whether there is "thick skin, thin flesh."
2. Smell: smell it raw once, once after warming it with hand heat, and once on a heater. Mature resin's original scent is mellow and not sharp; young resin is clear and intense with a pungent note; processed material reveals a chemical sweetness as soon as it is heated.
3. Soak: soak scrap pieces in water and observe deformation, color bleeding, and floating oil.
4. Ask: the resin formation method, harvest time, source region, and whether re-inspection is possible—the question list can refer to"Ten Questions You Must Ask Sellers When Buying Agarwood"。

VI. An example of actual appraisal in the shop

The winter before last, incense friend Lao Song brought in a piece of "mature red soil material," about the size of a fist, saying he had "grabbed" it when buying material in the south, at no small price. The shopkeeper took it in hand: the outer skin was black-brown and looked "decayed" with a strong sense of age, but the "oil" on the cross-section floated on the surface, and an inch inward it became white wood; after soaking in water for two hours, the piece swelled a circle, a layer of oil sheen appeared on the water surface, and black matter precipitated into the water; when the surface was scraped open, underneath were painted-on "golden silk oil lines," neatly arranged.

The shopkeeper laid it out plainly to Lao Song: the outer skin was artificially aged and dyed, the shape was high-pressure compressed, and the patterns were painted on—"three materials in one," with not a single bit of real resin formation.Lao Song squatted in the shop and smoked half a cigarette, then finally told the truth: "I just wanted it because it was cheap, forty percent below market, and at the time I even thought I'd gotten a bargain."

The shopkeeper tells this story repeatedly because it is the most typical pitfall in the raw material market:"A sense of age" can be artificially aged, "sinking grade" can be pressed out, and "oil lines" can be painted on—only the fragrance profile cannot be faked.If a piece's original scent does not hold up, then no matter how good the story is, it is just a piece of wood that has been packaged.

Words from the Shopkeeper

Raw agarwood and aged agarwood are the 'origins' of agarwood, while processed materials are the 'disguises' of the raw material market. Distinguishing the origin helps you establish a value coordinate system; recognizing the disguise helps you protect your wallet. Both point to the same action:Smell more genuine materials to establish your coordinates.

If you have material in hand and are unsure, cut a small piece and mail it to the shop, or bring it directly to the shop for free authentication—Beijing Songzhuang physical incense shop, we accept raw materials, bracelets, and incense sticks. You can also call400-809-1913first to describe the characteristics.Final reminder: The trade of raw agarwood involves compliance with CITES Appendix II species; for large transactions, always request source and compliance documentation. Materials with clear origins are reassuring to buy.

Frequently Asked Questions

Is aged agarwood always better than raw agarwood?

Not necessarily; it depends on the use. Aged agarwood has undergone long-term aging, with a mellow, sweet, and cool aroma, suitable for incense appreciation and collection; raw agarwood is clear and penetrating, and many veteran incense lovers prefer it, and the price is usually more friendly. The standard of 'good' is your nose and purpose, not the term itself.

Are earth agarwood and water agarwood aged agarwood?

Usually classified as aged agarwood—obtained after the incense material has aged for years in soil or water, hence the terms 'earth agarwood' and 'water agarwood.' When purchasing, don't be led by the terms: the qi and rhyme of earth agarwood should be clean and mellow. If you smell mold or fishiness, either the aging environment was problematic, or it is simply artificially aged and dyed material.

Can soaking in water distinguish compressed material from natural raw material?

Compressed material (pangdahai) will swell, delaminate, and release oil slicks when soaked in water, while natural material shows no obvious deformation—this is an effective preliminary screening method. However, soaking in water cannot be used alone for definitive identification; natural material may temporarily have a dulled aroma after soaking, so it needs to be dried in the shade promptly. The final judgment still requires comprehensive consideration of the cross-section, aroma, and source information.

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