# What Is Oud? Agarwood, How It Forms and Why It Costs So Much Mahasutra ยท 2026-10-22 Oud (agarwood) explained: how it forms in Aquilaria trees, what it smells like by origin, why it's expensive, CITES and cultivation, and oud accords. Oud is one of the most valuable natural materials in the world. The finest pieces have sold for more than their weight in gold, and the word appears on countless perfume bottles. Yet many people who wear "oud" perfumes have never smelled the real thing. Here is what oud is, how it forms, why it costs so much, and how to tell genuine oud character from an oud accord. ## What oud is Oud, also called agarwood, aloeswood or gaharu, is a dark, fragrant resin that forms inside the heartwood of Aquilaria trees, native to South and Southeast Asia. Several species produce it, including Aquilaria malaccensis, A. crassna in Cambodia, Laos, Thailand and Vietnam, and A. sinensis in southern China. A healthy Aquilaria tree has pale, odourless wood. Oud forms only when the tree is wounded and infected, for example when insects bore into the trunk and mould follows. In response, the tree floods the damaged wood with a protective resin. Over years, that resin darkens and hardens the wood. Only a small share of wild trees ever develop it, which is one reason it is so rare. ## What does oud smell like? Real oud is complex and varies enormously by origin, age and distillation. Depending on the source, it can be woody, smoky, leathery, balsamic, honeyed, fruity, animalic or "barnyard". Some ouds are clean and sweet; others are funky and challenging. That range is part of its fascination. - Cambodian oud (from A. crassna) is often described as sweeter, fruitier and more honeyed, with a refined leathery depth. - Indian and Assamese oud is famous for its deep, animalic, earthy character. - Ouds from Borneo and Sumatra range from green and woody to dark and resinous. ## Why oud is so expensive - Rarity: only a fraction of wild trees form resin. - Yield: distillation produces tiny amounts of oil from large amounts of wood. - Time: resin builds up over many years, and older, denser wood is prized. - Demand: oud has been treasured for centuries in the Middle East, South Asia and East Asia, where it is burned as incense and worn as oil. The highest grades of natural agarwood can command extraordinary prices, while low-grade, adulterated or immature material is far cheaper. ## Conservation and cultivation Overharvesting has devastated wild populations. Aquilaria malaccensis was listed under CITES Appendix II in 1995, and in 2004 all Aquilaria species were added, so international trade must be licensed and monitored. Today, plantations across Southeast and South Asia grow Aquilaria and deliberately inoculate the trees to trigger resin formation. Cultivated oud is the main route to a sustainable supply, and quality is improving. ## Real oud versus oud accords Most "oud" perfumes on the market use an oud accord: a blend of other natural and synthetic materials built to suggest oud's woody, smoky, leathery character. That isn't a trick; it is how perfumery handles rare and protected materials, and accords allow consistent quality at an accessible price. Natural oud oil, when used, is usually blended at low levels with woods, resins and spices. When a perfume lists oud, it is fair to ask whether it is natural oud oil, a cultivated oud, or an accord. Our Sacred Embers lists Cambodian oud in its base, with sandalwood, frankincense and labdanum. Marble & Cognac pairs oud with cognac, black cherry, iris and sandalwood for a boozy, woody style. ## How to wear oud - Start small: oud is powerful and long-lasting. One or two sprays, or a light touch of oil, is enough. - Evening and cooler air: its richness suits nights and air-conditioned rooms more than midday heat. - Pair it: oud blends naturally with rose, saffron, sandalwood, amber and incense, combinations rooted in Middle Eastern perfumery. - Try oil: oud is traditionally worn as oil, which keeps it close and lets it develop slowly. See perfume oil versus spray. For another precious wood at the heart of perfumery, read sandalwood in perfume. ## What is oud made from? Oud is resin-soaked heartwood from Aquilaria trees, formed when the tree is wounded and infected and floods the wood with protective resin. ## What does oud smell like? It varies widely: woody, smoky, leathery, honeyed, fruity or animalic, depending on origin, age and distillation. ## Is oud endangered? Wild Aquilaria trees have been heavily overharvested; all species have been listed under CITES Appendix II since 2004. Cultivated, inoculated plantations now supply much of the market. ## Do oud perfumes contain real oud? Many use an oud accord built from other materials; some include natural oud oil at low levels. It's fair to ask which. ## Products mentioned - [Sacred Embers](https://mahasutra.co/products/sacred-embers) - [Marble & Cognac](https://mahasutra.co/products/marble-cognac) ## Sources - [Wikipedia: Agarwood](https://en.wikipedia.org/wiki/Agarwood) - [TRAFFIC: Agarwood use and trade and CITES implementation](https://www.traffic.org/site/assets/files/9731/agarwood-use-and-trade-and-cites-implementation.pdf)