What Is Oud? The World's Most Expensive Wood

Top: sharp, slightly medicinal, woody-smoky. Heart: complex, dark, leathery-animalic, rich and multifaceted. Base: deep, balsamic-woody, sweet, extraordinarily tenacious. Cambodian oud is sweeter and cleaner; Indian oud is deeper and more animalic; Indonesian oud is smokier and wilder.

Oud, known as agarwood, aloeswood, or bois d'aigle, is perhaps the most culturally significant and commercially valuable aromatic material in the world. It is produced when certain trees of the genus Aquilaria become infected with a specific mould (Phialophora parasitica or related species), triggering the production of a dense, aromatic resin as a defence mechanism. Only infected trees produce oud; healthy Aquilaria wood is pale, odourless, and commercially worthless.

The resulting resinous heartwood has been treasured across Asian and Middle Eastern cultures for thousands of years. In Japan, it forms the basis of kodo, the Way of Incense, an art form as refined as the tea ceremony. In the Gulf states, oud chips are burned as bakhoor during social gatherings, and oud oil (dehn al-oud) is applied directly to the skin as a personal fragrance. Chinese, Tibetan, and Southeast Asian traditions all have their own deep histories with the material.

The scent of genuine oud is immensely complex and varies dramatically with species, geographic origin, and grade. Cambodian oud tends to be sweeter and more fruity, with dried plum and honey facets. Indian oud (from Assam) is typically more animalic and barnyard-like, with pronounced leather and medicinal qualities. Indonesian and Malaysian ouds often fall between these poles, offering a balance of sweetness and depth.

Wild oud is now critically endangered. Aquilaria trees have been so extensively harvested that all species are listed under CITES (Convention on International Trade in Endangered Species). Plantation cultivation has expanded rapidly, with trees deliberately inoculated with the fungus, but purists argue that cultivated oud lacks the depth and complexity of wild-harvested material that has aged naturally over decades. Regardless, plantation oud has become essential for the industry's survival.

In Western perfumery, oud has gone from obscure specialist material to mainstream trend over the past two decades. Many Western oud fragrances use synthetic oud accords, built from molecules like Javanol, Georgywood, and guaiacol derivatives, rather than natural oud oil, which at its finest grade can cost more than gold by weight. These accords capture certain facets of the oud profile while offering the consistency and regulatory compliance that natural oud cannot always guarantee.

What Does Oud Smell Like?

What does oud smell like? The answer depends enormously on quality and origin. Raw oud oil from Assam (India) tends dark, barnyard, and almost fecal at full strength, transforming into a honeyed, woody sweetness at skin-level dilution. Cambodian oud is generally sweeter, fruitier, and more approachable, with notes of dried plums and caramel. Laotian oud sits between the two. Synthetic oud molecules like Javanol and Iso E Super capture isolated facets — the woody warmth, the creamy sweetness — without the animalic depth that makes natural oud so polarizing and so prized.

Why Oud Is So Expensive

Oud comes from the heartwood of Aquilaria trees infected by a specific mold (Phialophora parasitica). Only 7–10% of wild trees develop the infection naturally. The resinous, fragrant heartwood — agarwood — must be aged for decades to reach peak olfactory complexity. A kilogram of high-grade oud oil from old-growth Assamese trees can cost $50,000 to $100,000, making it literally more expensive than gold. Plantation oud, where trees are deliberately inoculated, has reduced costs somewhat, but the finest oud remains a wildcrafted treasure.

At Première Peau

The DISCOVERY SET offers an introduction to oud-inspired compositions alongside explorations of ambergris and other precious materials.