Conclusion first: agarwood is not a kind of wood, but a kind of "incense." It is the product of trees of the Aquilaria genus in the Thymelaeaceae family being injured, then infected by fungi and secreting resin over many years to encase the wound, ultimately forming a combination of "resin and wood." This process takes at least several years and at most several decades, and good wild material is now produced less and less — this is the fundamental reason agarwood is valuable.
Key Points
- Agarwood is "incense that is formed," not "wood that grows": an Aquilaria tree that has not been injured and gone through the agarwood-forming process contains almost no fragrance itself.
- Formation chain: tree injury (wind breakage, insect borers, lightning strikes, knife cuts) → fungal infection → tree secretes resin → maturation over several years to several decades before agarwood is formed.
- Origins fall into two major lineages: the Hui'an lineage (Vietnam, Cambodia, Laos region) and the Sin Chew lineage (Indonesia, Malaysia, Brunei region), with production also in China's Hainan, Guangdong, and Yunnan.
- Value comes from three things: slow formation, scarce wild resources, and a demand for its fragrance and medicinal culture that has continued for a thousand years, with high-quality material almost impossible to rapidly produce artificially.
- Wild populations of Aquilaria are listed in CITES Appendix II; cross-border trade requires legal certification, and compliance costs are also factored into the price.
Many people's first impression of agarwood is wrong; the shopkeeper will first make this clear.
Misconception 1: "Agarwood is a kind of precious wood."Wrong. Sandalwood and red sandalwood are the ones where "the wood itself is fragrant"; the wood of the Aquilaria tree is loose and light in color, has almost no fragrance itself, and is not precious. What is precious is the part that has formed agarwood. On the same Aquilaria tree, the part that has not formed agarwood is sold as ordinary wood, while the part that has formed agarwood is priced by the gram — a difference of hundreds of times.
Misconception 2: "Cut down an Aquilaria tree and you get agarwood."Wrong. Agarwood formation is the tree's "self-healing," not a regular physiological process. In earlier times wild agarwood formed through natural injury, with a very low probability; now plantations rely on artificial drilling and fungal inoculation to induce fragrance, but the cycle and fragrance profile still differ from old wild material.
Misconception 3: "All agarwood sinks in water."The term "sinking grade" comes from the ancients' experience of judging oil content by whether it sinks in water; only with sufficiently high oil content will it sink. But agarwood's oil content varies enormously, and plenty of high-quality agarwood does not sink. Applying a one-size-fits-all "sinks or not" standard makes it easy to be led along by merchants.
The chain is simple; what is hard is the time.
The Song dynasty scholar Ding Wei wrote Tianxiang Zhuan specifically on the causes and grades of agarwood; Li Shizhen's Ming dynasty Bencao Gangmu places agarwood under the wood section, aromatic woods category, describing it as "acrid in nature, slightly warm" — the ancients' observation that "the wood is wounded and then becomes fragrant" basically matches today's botanical explanation. The very first thing Zhou Jiazhou examines in the opening of his Xiang Cheng is the origins and varieties of agarwood, showing the weight agarwood carries in Chinese incense culture(香学). On this site there are 《A Brief History of Agarwood》 and 《The Principles of Agarwood Formation》 — follow along if you'd like to read in detail.
The shopkeeper once saw a comparison at a Hainan base: among the same batch of cultivated trees, agarwood inoculated for two years showed shallow oil lines when cut open, with fragrance floating on the surface; older trees inoculated for seven or eight years showed deeper oil color and a fragrance that draws inward. In agarwood formation, time is the most expensive cost.
Based on historical trade routes, the industry customarily divides agarwood producing regions into two major lineages.
| Lineage | Representative Regions | Fragrance Tendency | Common Condition |
|---|---|---|---|
| Hui'an Lineage | Vietnam (Nha Trang, Phu Quoc), Cambodia, Laos | Fresh and sweet, cool, floral | Mottled oil lines, mostly chunks, fragments are costly |
| Singapura Lineage | Indonesia (Kalimantan, Tarakan, Manado), Malaysia, Brunei | Mellow and full, milky, woody | Dense oil lines, relatively regular material |
China also has local production. Hainan agarwood was called "qiongzhi" in ancient times, with tribute records in the Lingnan region across dynasties; today Guangdong and Yunnan have plantations. Hainan's wild resources have long been scarce, and most so-called "Hainan wild" on the market is both expensive and half genuine, half fake — beginners should be especially careful with this producing region. For detailed characteristics of each region, see 《Characteristics of Agarwood from Each Producing Region》and《Differences between the Hui'an and Xingzhou families》。
Origin is only a clue, not a conclusion. The same production area can yield good and bad material; ultimately it comes back to three things: oil lines, aroma, and source.
The value logic breaks down into four layers.
First, supply is slow.Wild agarwood forms resin through natural wounding; a single tree takes decades to produce one piece of good material, and each piece harvested is one less. Traditional production areas in Vietnam and Hainan have been exploited over many years, wild resources are increasingly depleted, and what circulates on the market is mostly legacy material passed down in the hands of early collectors.
Second, demand is steady.Agarwood has been used in China for thousands of years: incense burning, medicine, ornaments, and ritual offerings. In the Song dynasty, among the literati's "four leisurely pursuits," incense burning ranked first, and from the Ming and Qing onward incense culture spread deep into ordinary life. Demand has never gone away, supply is shrinking, and prices naturally rise.
Third, there is a gap in artificial substitutes.Planted agarwood solves "whether it exists" but not "whether it is good." Plantation material is plentiful and cheap, adequate for everyday burning, but its aroma layers and mellow richness generally cannot catch up with old wild material. That is why under the same name "agarwood," the price per gram can range from tens of yuan to tens of thousands.
Fourth, compliance costs.All species of the genus Aquilaria are listed in CITES Appendix II, and cross-border trade requires a permit certificate for customs clearance. In recent years there have been many news reports of customs seizing agarwood products: in January 2026 Haikou Customs seized about 500 grams of Aquilaria species in inbound mail, and earlier Xiamen Customs seized 48.65 kilograms of agarwood wood in a passenger's luggage—bringing endangered-species products in or out of the country without legal documents can, in serious cases, lead to criminal liability. Compliant goods cost a stretch more than "three-no" loose goods, but you buy with peace of mind.
For a full breakdown of the cost side, see《Why Agarwood Is Expensive》；《An Examination of Agarwood》sorts out the understanding of agarwood across dynasties from a documentary perspective. English readers can seeWhat Is Agarwood。
The underlying logic of agarwood in one sentence:A wounded tree trades time for fragrance; those who understand pay for time.
No. Agarwood is a "resin-and-wood composite" formed after a tree of the Aquilaria genus in the Thymelaeaceae family is wounded and produces resin. Its value lies in the resinous part, not the wood. The wood of an Aquilaria tree that has not formed resin is loose and odorless, priced as ordinary timber; the price per gram between the two can differ by hundreds of times.
No. Resin formation requires "wounding + infection by specific fungi + long aging" to occur simultaneously, and the probability under natural conditions is very low. Plantations rely on artificial drilling and inoculation to induce resin formation, greatly increasing the resin-formation rate, but the resin-formation cycle and the mellowness of the aroma still lag behind wild, aged material.
The core is the time gap between supply and demand: good wild material emerges only once in decades, and each piece harvested means one fewer; meanwhile, demand for incense, medicinal use, and ornaments has continued for thousands of years, and with the compliance costs of CITES Appendix II, the price of quality agarwood trends upward over the long term. Plantation material at tens of yuan per gram and wild sinking-grade material at tens of thousands of yuan per gram are both called agarwood; the price gap lies in the degree of resin formation, producing region, authenticity, and sales channel.
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Ask about agarwood-related questionsCompiled from 12 years of incense-selection experience: examine oil lines, smell the aroma, test sinking grade, identify producing regions—4 steps to judge agarwood authenticity yourself, so even beginners can avoid pitfalls. Send a WeChat message and it will be sent, free forever.
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