Short answer: Agarwood is resin-enriched, aromatic wood that develops in certain trees—principally species of Aquilaria and Gyrinops in the Thymelaeaceae family—after the tree responds to injury and related biological stress. The pale wood changes chemically and physically as defensive compounds accumulate. In trade, the wood may be called agarwood, oud, oudh, aloeswood or gaharu; distilled oil is a separate product called oud oil or agarwood oil.
Evidence boundary: This guide explains established botany, terminology, product forms and trade controls. It does not claim that one fungus always causes agarwood, that every tree produces commercial resinous wood, or that scent provides a medical benefit. Product quality and legality require lot-specific evidence.
Agarwood at a glance
Agarwood is a material formed inside a tree, not the name of one universal grade. Healthy Aquilaria wood is usually light and only mildly aromatic. Wounding and other stresses can activate defensive pathways; resin-associated compounds then accumulate unevenly in affected wood. The result may range from faintly altered wood to dark, strongly aromatic material.
| Question | Concise answer |
|---|---|
| What is agarwood? | Resin-enriched aromatic wood formed in susceptible trees after injury and related stress responses. |
| Which trees are involved? | Trade and conservation work focuses mainly on Aquilaria and Gyrinops, both in Thymelaeaceae. |
| Is agarwood the same as oud? | The terms often overlap for the aromatic wood; “oud oil” normally means a distilled product, while a perfume “oud accord” may be reconstructed. |
| What is it used for? | Wood chips, incense, distilled oil, beads, carvings and documented cultural or traditional preparations. |
| Is trade unrestricted? | No. Aquilaria spp. and Gyrinops spp. are listed in CITES Appendix II, with an annotation that varies by product form. |
What is agarwood made of?
Agarwood is wood tissue containing a complex mixture of plant-produced compounds; it is neither a block of pure resin nor the fungus itself. Studies repeatedly identify sesquiterpenes and 2-(2-phenylethyl)chromone derivatives among its important compound groups. Composition differs by species, tree, formation history, location within the tree, age, processing and analytical method.
A material created by a tree response
A single-cause description such as “Phialophora parasitica infects the tree and makes agarwood” is too absolute. Research has associated formation with wounding, insect activity, microbial interactions and artificial induction. A controlled Aquilaria sinensis study also observed wound-induced sesquiterpene biosynthesis without a corresponding change in microbial communities. The defensible definition is therefore a tree defence response shaped by several interacting factors, not a guaranteed one-fungus recipe.
How does it differ from unaffected wood?
- Colour and pattern: resin-associated zones may look yellow-brown, brown or dark, often in irregular streaks. Colour alone cannot authenticate or grade a sample.
- Density: some resin-rich material is denser than adjacent pale wood, but moisture, structure, treatment and product construction also affect weight and sink behaviour.
- Aroma: heating or distillation releases a complex profile that may be described as woody, sweet, balsamic, leathery, earthy, spicy, smoky or animalic. No single descriptor applies to every sample.
- Chemistry: proportions and individual compounds vary; one study result cannot be treated as a certificate for every lot or every finished product.
For commercial names, material formats and their identification limits, continue with the types of agarwood guide. It does not treat every regional label as a botanical species or universal grade.
How does agarwood form?
Formation begins when a susceptible tree is injured or stressed and activates defence pathways in affected wood. The biological process is variable, and the amount, location and chemical profile of the resulting material are not uniform across a trunk or between trees.
- Injury or stress occurs. Natural damage, insects, pruning, drilling, fire, microbial interaction or an induction treatment may create the initiating conditions.
- The tree responds. Wound signalling, vessel occlusion and secondary-metabolite pathways change in affected tissues.
- Compounds accumulate over time. Resin-associated constituents and altered wood develop locally rather than converting the whole tree at once.
- The material is harvested and processed. Wood may become chips, powder, beads or carvings; volatile oil may be obtained by distillation. Processing changes the final product and its evidence requirements.
For the research, induction methods and limits of universal timelines, read the dedicated agarwood formation guide.
Which trees can produce agarwood?
Aquilaria and Gyrinops are the principal genera named in international agarwood trade controls. They belong to the flowering-plant family Thymelaeaceae. Kew accepts Aquilaria malaccensis and records a native range from Bangladesh through western and central Malesia, including parts of South and Southeast Asia. Other species have different native ranges, so one species page should not be generalized to the entire genus. The supporting agarwood tree biology and classification guide explains tree structure and taxonomy in more detail.
A tree’s species, plantation location and product origin are separate facts. A country name on a listing does not prove that the species is native there, that the wood was harvested there, or that the lot has a particular quality. Use the agarwood geographic distribution guide for the botanical range and the legal and CITES guide for trade questions.
Does every Aquilaria or Gyrinops tree contain agarwood?
No. Belonging to a resin-capable genus does not mean that every tree, branch or section contains commercially useful aromatic material. Formation must occur, and it can be patchy. Seed labels such as “kynam seed” cannot guarantee a future grade because grade describes material assessed after growth and formation, not a genetically certified retail seed class.
Are agarwood, oud, aloeswood and gaharu the same?
They often refer to the same broad aromatic material, but context and product form matter. A label should state whether it means raw wood, processed incense, distilled oil or a fragrance accord.
| Term | Practical meaning | Common ambiguity |
|---|---|---|
| Agarwood | The resin-enriched aromatic wood or material derived from it. | Sometimes used loosely for the tree itself. |
| Oud / oudh | A trade and fragrance term that can refer to agarwood or its aroma. | A perfume “oud” may be a blend or reconstructed accord rather than distilled agarwood. |
| Oud oil / agarwood oil | A volatile product distilled from agarwood when the seller’s material and process claim is accurate. | Purity, dilution and extraction language are not proven by the name alone. |
| Aloeswood / eaglewood | Historical or English common names used for agarwood. | Aloeswood is not the succulent aloe plant. |
| Gaharu, jinkō, chénxiāng | Regional-language terms with particular cultural and grading contexts. | They should not be converted automatically into one universal grade. |
Is oud always natural agarwood?
No. On a raw wood listing, oud may describe agarwood. In perfumery, “oud” can describe a scent direction created with natural agarwood oil, other natural materials, aroma chemicals or a combination. Buyers should look for the exact ingredient, material percentage, extraction method, dilution, batch and analysis rather than relying on the word alone.
What does agarwood smell like?
Agarwood can smell woody, sweet, balsamic, earthy, spicy, smoky, leathery or animalic, but there is no universal oud scent. Species, formation, location within the tree, processing, storage, heat and individual perception can all change the result. Raw wood at room temperature, gently heated chips, burning incense and distilled oil should not be expected to smell identical.
How should two samples be compared?
Use the same material amount, burner or application method, heat progression, room, time intervals and note-taking vocabulary. Compare blind when practical. Oudgo’s agarwood scent guide provides a repeatable protocol and explains why a powerful first impression is not proof of authenticity.
Does the scent prove a health or spiritual effect?
No. Aroma preferences and cultural use are real topics, but a subjective feeling does not establish a medical outcome. Historical use in a pharmacopoeia or ritual is also not the same as clinical evidence for inhaling a retail product. Oudgo routes historical and religious questions to the religion and rituals guide and medical-evidence questions to the traditional-medicine evidence review.
What is agarwood used for?
The main modern forms are wood chips, incense, distilled oil, beads and carvings. The correct use, safety controls and evidence differ by form.
| Form | Typical use | What to verify |
|---|---|---|
| Wood chips | Gentle electric heating or indirect charcoal heating for aroma. | Species/source claim, actual-lot images, weight, treatment and trade documents. |
| Incense | Sticks, coreless sticks, cones, coils or powder designed to smolder. | Agarwood percentage, binder, core, added fragrance, ventilation and fire safety. |
| Oud oil | Fine fragrance or external personal fragrance use according to the product directions. | Raw material, distillation, dilution, bottle quantity, lot and matching analysis where available. |
| Beads and bracelets | Wearable objects, prayer beads or collecting. | Material evidence, bead count/size, total weight, construction and origin disclosure. |
| Traditional preparations | Practices recorded in specific medical or cultural systems. | Exact preparation, jurisdiction, qualified guidance and whether human evidence applies to that use. |
How are chips different from oud oil?
Chips are pieces of resin-enriched wood. Oud oil is a volatile distillate when genuinely made from agarwood, and it does not contain every less-volatile compound found in the wood. Finished incense introduces formulation variables such as binder and added fragrance. Read the oud oil production and buying guide before treating these formats as interchangeable.
How has agarwood been used in culture?
Agarwood and related incense traditions appear in documented religious texts, court culture, perfumery, trade and Japanese incense practice. Claims need a named text, object, institution, region and date; one symbolism should not be projected onto every culture. See the sourced agarwood history and culture timeline.
Is agarwood a medicine?
Agarwood appears in several traditional medical systems and laboratory studies investigate isolated compounds or extracts. That does not prove that burning incense, wearing beads or using an unspecified retail oil treats disease. Product-specific safety, dose, route, evidence and regulation still apply; Oudgo does not present consumer agarwood products as treatments.
Why is agarwood valuable?
Value reflects variable formation, limited recoverable material, skilled processing, sensory demand, cultural history and legal supply—not a universal price per kilogram. Format, net weight, species/source evidence, resin distribution, aroma under a controlled method, processing, condition and provenance can all affect a transaction.
Dark colour, a country name, a strong scent or sinking in water cannot establish value by itself. Use Oudgo’s seven-factor quality and grading framework, real-versus-fake evidence checks and agarwood price-comparison method.
Is agarwood legal to buy and ship?
Legal status depends on the taxon, product form, source, shipment route and current rules. CITES lists Aquilaria spp. and Gyrinops spp. in Appendix II. Annotation #14 contains specified exclusions, but its finished-product exemption does not apply to wood chips, beads, prayer beads or carvings. Appendix II is a trade-control listing, not a blanket statement that every purchase is prohibited or that a product is sustainable.
Ask for the scientific name when known, country and source type, seller identity, invoice, lot linkage and documents applicable to the exact shipment. Check current export, import, wildlife, plant-health and carrier rules before purchase; use the international agarwood legal checklist for the next step.
How can buyers evaluate an agarwood claim?
- Identify the form. Raw wood, incense, oil and beads require different tests and disclosures.
- Separate identity from grade. Evidence that material is agarwood does not show that it is a top grade.
- Request lot-level facts. Look for current photos, net weight, dimensions, source claim, processing and any matching documents.
- Use multiple signals. Appearance, density, scent and burn behaviour each have limitations; no home test is universal proof.
- Check regulated trade. A quality certificate cannot replace required CITES or customs documents, and a permit does not prove scent quality.
Frequently asked questions
Is agarwood the same as oud?
Agarwood and oud often name the same aromatic wood in trade. “Oud oil” usually means a distilled product, while an “oud” perfume may use natural oil, a reconstructed accord or both. Read the material and ingredient disclosure.
Does every Aquilaria tree produce agarwood?
No. A susceptible tree must undergo formation, and the resin-enriched zones can be uneven. Species or seed identity does not guarantee a future quantity, grade or market value.
What does agarwood smell like?
Descriptions can include woody, sweet, balsamic, earthy, spicy, smoky, leathery and animalic notes. The result changes with sample, processing, heat and perception, so there is no universal agarwood scent.
Why is agarwood so expensive?
Formation is variable, recoverable aromatic material can be limited, processing requires skill, demand is international and trade can require documentation. Prices still depend on form, weight, evidence, condition and buyer—not a universal rarity claim.
Is agarwood legal in the United States?
There is no one-word answer for every product. Aquilaria and Gyrinops are CITES-listed, and U.S. import requirements depend on species, source, form and shipment. Verify current CITES, U.S. wildlife, customs and plant-health requirements for the exact transaction.
What is agarwood used for?
Agarwood is used as heated wood chips, incense, distilled fragrance oil, beads, carvings and in some documented cultural or traditional preparations. Each form has different safety, evidence and trade requirements.
Editorial method and limitations
This page was rebuilt by the Oudgo Editorial Team as an entity-level reference. We separated botany, material chemistry, product form, cultural record, medical evidence and legal trade; removed universal fungus, healing, “higher than gold,” sink-test and guaranteed-sustainability claims; and routed detailed questions to specialist guides. The current article is a source review, not a laboratory test or first-hand batch study.
Last substantively reviewed: August 13, 2026. CITES annotations, taxonomy and scientific understanding can change; regulated shipments should be checked against current official requirements.
Sources
- Royal Botanic Gardens, Kew — Aquilaria malaccensis taxonomy and native range
- CITES — guide to CITES-listed tree species, including Aquilaria, Gyrinops and Annotation #14
- Xu et al. — transcriptome analysis of healthy and wounded Aquilaria sinensis tissue
- Liu et al. — wound-induced sesquiterpene biosynthesis and vessel occlusion without microbial-community variation
- Ding et al. — chromosome-level reference genome of Aquilaria sinensis
- Liu et al. — chemical profiles of agarwood incense-smoke ingredients by headspace GC–MS/MS
