Sandalwood vs. Agarwood: Different Trees, Different Fragrant Wood

Sandalwood (tanxiang, 檀香) and agarwood (chenxiang, 沉香) are both fragrant woods, but they do not come from the same tree or acquire their scent in the same way. True sandalwood commonly refers to the aromatic heartwood of Santalum trees, especially Santalum album. Agarwood is resin-rich wood formed in some Aquilaria and Gyrinops trees after a stress response. Knowing the botanical name and the part of the tree is more useful than judging a polished bead by scent alone.

Start with the trees, not the fragrance

Kew lists Santalum album in the sandalwood family, Santalaceae. Its fragrant heartwood can be carved or distilled for oil. The word “sandalwood” also covers other Santalum species in trade, so a label that says only “sandalwood” does not identify a species.

Agarwood—also called oud, oudh, aloeswood, or chenxiang (沉香) in Chinese—is associated mainly with trees in Aquilaria and Gyrinops, in the family Thymelaeaceae. For example, Kew identifies Aquilaria sinensis as a distinct species native to southeastern China and Hainan. “Oud” may name a piece of wood, a distilled oil, or a perfume accord; the word alone does not establish what is in a bottle.

Why the fragrant part differs

Sandalwood: its inner heartwood is the valued aromatic material. A Santalum album tree does not have to become wounded and resin-saturated to be called sandalwood. Kew’s botanical account describes fragrance used in perfumery and oil distilled from the heartwood. The scent is often described as soft or creamy, but fragrance varies with species, material, and processing.

Agarwood: a standing Aquilaria or Gyrinops tree is not automatically a piece of agarwood. In some trees, physical injury or microbial attack prompts a defensive response, and resin accumulates in wood. A review of agarwood chemistry distinguishes this resin-rich portion from the tree’s ordinary, non-resinous tissues. Natural formation is variable; cultivated trees may also be deliberately induced to produce agarwood. None of these routes makes every dark or strongly scented chip authentic.

The table compares botanical materials, not guaranteed aromas or grades. Species, extraction, added fragrance, and blending can all change a finished product. A photo cannot confirm its chemical composition or legal origin.

Where traditional uses overlap—and where they do not

Both woods have histories as aromatic materials, but each culture and period has its own practices. The Metropolitan Museum of Art’s account of Japanese incense describes sandalwood and aloeswood among materials kept in incense sets, and later gatherings in which people appreciated small pieces of fragrant wood. This is a documented example of use in Japan, not a universal rule for all Asian rituals.

Sandalwood has also been used in carving and perfumery, while agarwood has been valued for incense and perfume. Chinese forestry researchers describe sandalwood heartwood as a traditional medicinal material, and their account of agarwood also records a history in materia medica. Those records describe traditional uses; they do not show that a consumer product treats a condition. This article is about plant identity and material culture, not directions to ingest wood or use essential oils as medicine.

Three useful questions before you buy

1. Which plant and which material? Ask for the scientific name and whether the item is solid wood, resin-rich wood, a blend, an oil, or a perfume accord. “Red sandalwood” is a particularly important name trap: Pterocarpus santalinus belongs to Fabaceae, not the Santalum family. It should not be silently substituted for Santalum album.
2. What is the sourcing record? Ask the seller for origin and traceability information, especially for agarwood. CITES identifies Aquilaria and Gyrinops as Appendix II agarwood-producing taxa; controls depend on the product form and trade route. UK government guidance, for example, explicitly names agarwoods among protected woods that may require documentation on entry. Check current rules with the relevant authority before cross-border purchase or travel.
3. What can you actually verify? Smell, color, grain, price, and whether a chip sinks in water are clues at most, not a reliable home authentication method. A named species and credible supply records are stronger starting points; consequential identification may require specialist examination.

Keep the material, and its context, intact

For a wood carving or bead, keep it dry and away from prolonged sunlight, high heat, soaking, and heavy perfume or oil. Dust gently with a soft cloth. If a product is made to be heated as incense, follow its maker’s directions, use a suitable burner, ventilate the space, and never leave heat unattended. A decorative bead need not be burned to “activate” anything.

The most dependable distinction is simple: sandalwood names a fragrant Santalum heartwood; agarwood names resin-rich wood formed in certain other trees. From there, a precise label, provenance, and respect for the traditions in which a material is used tell you more than a dramatic promise about its powers.

Cover image: agarwood display at Shenzhen Museum, photographed by Harmxiuyaeh, CC BY-SA 4.0; resized to 1,280 px, no crop. The museum display is illustrative and is not a Lotus Harmony product.