What Is Oud? The World's Most Expensive Wood Explained
By Noor East Health & Wellness Team | Pro Tips Blog
Quick Answer
What is oud and why is it so expensive?
- ✓ Oud (also called agarwood) is a resinous heartwood that forms in Aquilaria trees when they are infected by a specific mould
- ✓ Only 2% of Aquilaria trees produce oud naturally, making it extraordinarily rare
- ✓ Wild oud can cost more than £10,000 per kilogram, making it more expensive than gold by weight
- ✓ Used in perfumery as chips (burned), as oil (attar), and as a note in luxury eau de parfum
- ✓ Mentioned in Islamic tradition as one of the inhabitants of Paradise
Oud is the most valuable natural fragrance material in the world. Known in Arabic as عود (oud), in English as agarwood or aloeswood, it is the resinous dark heartwood that forms inside Aquilaria trees when the tree becomes infected by a specific type of mould. The mould triggers a defensive reaction in the tree, which produces a fragrant resin that saturates the surrounding wood over decades.
The result, when burned or distilled into oil, is a deep, complex, animalic, woody, balsamic fragrance unlike anything else in the natural world. This is why oud has sat at the centre of Arab fragrance culture for over a thousand years, and why it now commands extraordinary prices globally.
In this article
How Oud Forms and Why It Is So Rare
Aquilaria trees grow naturally across a wide band from northeastern India through Myanmar, Thailand, Cambodia, and Indonesia. The infection that produces oud is caused by the mould Phialophora parasitica. When the tree is infected, it produces a dark, resinous compound to contain the mould. This process takes years to decades. A single tree may produce only a small section of oud-quality resinous wood, or none at all.
Wild-sourced estimates suggest only 2 to 7% of Aquilaria trees in their natural habitat develop oud. The process cannot be reliably accelerated, and over-harvesting of wild trees has led to Aquilaria being listed on CITES Appendix II. High-grade wild oud from Cambodia or Assam can reach £10,000 to £30,000 per kilogram.
What Are the Different Types of Oud?
Oud is primarily classified by origin, and each region produces a distinctive character. Indian oud (Agar al-Hindi), particularly from Assam, is considered the benchmark of quality: intensely animalic, dark, and complex. Cambodian oud is sweeter, slightly fruity, and more approachable. Indonesian oud is deeply woody, rich, and smoky. Arabian oud is often a blend of regional ouds processed in Gulf countries, with a smoother, more balanced profile suited to Arab tastes.
Oud Chips, Oud Oil, and Oud Perfume: What Is the Difference?
Oud chips are pieces of the raw resinous wood, burned directly on charcoal in a mabkhara or on an electric burner. This is the most traditional way to experience oud, and it produces the most complex fragrance profile.
Oud oil (oud attar) is produced by steam distillation of oud wood. The resulting oil is extremely concentrated and intensely fragrant. A small amount (1 to 2ml) applied to skin lasts many hours.
Oud perfume (EDP or EDT) uses oud oil as a note in a broader fragrance composition, blended with other ingredients like rose, saffron, musk, sandalwood, and amber. This makes the oud more wearable, more affordable, and approachable for those new to oud fragrance.
Citrus freshness with deep oud and woody notes. Long-lasting unisex EDP, 100ml.
Oud in Islamic Tradition
Oud holds a specific place in Islamic religious tradition. Ibn Abbas (RA) reported that the Prophet Muhammad (SAW) said: "Fumigate your houses with oud al-Hindi (Indian oud) and oud al-azraq (a specific type of oud), for they have benefits for seven ailments, among them respiratory illness." (Ibn Majah.) Another narration names oud as one of the materials of Paradise.
The use of oud in Islamic practice extends to burning it in mosques during special occasions, scenting the Kaaba in Makkah (a tradition maintained to this day using premium oud), and wearing it as a personal fragrance for Friday prayers.
Spicier, darker, and more intense than Reminiscence. The bolder choice for oud lovers.
Frequently Asked Questions
Is oud halal?
Yes. Natural oud (wood or oil) is entirely plant-derived and contains no alcohol or prohibited ingredients. Alcohol-free oud options include oud attar (pure oil), oud chips for burning, and alcohol-free concentrated perfume oils, all of which are halal.
What does oud smell like?
Oud is described as warm, woody, complex, slightly animalic, and deeply earthy. There are sweet, balsamic undertones and, in high-quality specimens, a remarkable multi-dimensional complexity that evolves over hours on skin or in the air.
Why is oud so expensive?
Three factors drive the price: biological rarity (only a small percentage of trees produce usable oud), the decades required for wild oud to develop, and the labour-intensive harvesting process. High-grade wild Indian oud remains one of the rarest and most expensive natural materials in the world.
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