What does oud smell like? The world's most dramatic note

Oud divides people like no other note. The first time you smell it, you either fall for it or open a window. For thousands of years it has been burned in temples, worn at weddings and traded across oceans. Today it is in perfumes from Paris to Dubai.

What does it smell like?

Deep, smoky and woody, with leathery, medicinal and slightly animalic sides. Good raw oud is surprisingly complex. In one breath you might notice:

• Wood: dark, damp, old wood, like the inside of an antique cabinet
• Smoke and incense: the smell of a temple or a mosque after prayers
• Leather and animal: a warm, barnyard-like note that many people find shocking at first
• Sweetness: a honeyed, almost fruity glow underneath
• Medicine: a sharp, rubbery edge some compare to plasters or cough syrup

Oud also changes a lot on skin. The first minutes can be harsh. After an hour it usually turns softer, sweeter and more like warm skin.

Most designer perfumes don't use raw oud. They soften it with rose, vanilla, saffron or amber, so what you smell is smooth and rich rather than wild.

Where it comes from

Oud is the Arabic word for "wood". The material itself is called agarwood, and also aloeswood or eaglewood. It comes from Aquilaria trees, which grow across South and Southeast Asia: India, Bangladesh, Cambodia, Vietnam, Laos, Thailand, Malaysia, Indonesia, Papua New Guinea and southern China.

The surprising part is that a healthy Aquilaria tree has almost no smell. Oud only forms when the tree is hurt. When the wood is wounded by insects, lightning, animals or a fungal infection, the tree defends itself by flooding the damaged area with a dark, fragrant resin. Over years, sometimes decades, that resin soaks into the pale heartwood and turns it dark brown or black. That resin-soaked wood is agarwood.

Only a small share of wild trees ever form it. One estimate puts it at just 2%. That is why wild oud has always been so rare.

How oud oil is made

There are two main ways oud is used:

1. As wood. Small chips of agarwood are burned slowly over charcoal. This is the oldest way to enjoy it, and the smoke is used to scent homes, clothes and hair.
2. As oil. Agarwood is chipped into small pieces, soaked in water for days or weeks, then distilled. The oil that rises with the steam is collected. It takes a lot of wood to make a tiny amount of oil.

The region matters, much like wine. Oils from India (Assam) are often called "Hindi oud" and are known for being dark, earthy and barnyard-like. Oils from Cambodia and Vietnam tend to be sweeter, fruitier and more honeyed. Malaysian and Indonesian ouds can be greener and woodier. Collectors argue about these styles the way wine lovers argue about vineyards.

A short history of oud

Oud is one of the oldest perfume materials in the world.

• Ancient India (around 2000 BCE onwards): Early Sanskrit texts call it agaru and link it to prana, the breath of life. The Sushruta Samhita, an ancient medical text, recommends it for inflammation.
• Ancient Egypt: Oud and frankincense are believed to have been used in embalming nobles.
• Ancient Greece and Rome: The physician Dioscorides (1st century CE) describes it in his famous De Materia Medica.
• The Bible: The "aloes" mentioned alongside myrrh in several passages are widely believed to be agarwood, not the aloe vera plant.
• China and Japan: Agarwood was burned at funerals and in temples. In Japan it became the heart of kōdō, the "way of incense", a refined art of "listening" to burning fragrant wood. The most prized grade there is called kyara.
• The Arab world (7th century onwards): Arab traders brought agarwood west through India and along sea and Silk Road routes. Oud became central to Arabian hospitality and remains so today.

In the Gulf, oud is part of daily life. Guests are welcomed with burning bakhoor (scented wood chips), clothes are perfumed over a censer called a mabkhara, and grooms are scented with oud before a wedding.

How oud came to Western perfume

Oud was almost unknown in European and American perfume until the early 2000s. YSL M7 (2002), created by Alberto Morillas and Jacques Cavallier under Tom Ford, was the first big designer launch to put oud at its centre. It brought oud to department-store counters across Europe and the US.

Tom Ford then launched Oud Wood (2007), which became a best-seller and started the "oud boom". By some counts, about 27 fragrances contained oud before M7. More than 340 had been released by 2013, and the number has kept growing since.

Why oud is so expensive

Oud is often called "liquid gold", and for good reason:

• Only a small share of trees ever produce it.
• Natural formation can take decades.
• Wild Aquilaria trees were heavily over-harvested. Since 2004 all Aquilaria species have been listed under CITES Appendix II, which controls international trade.
• A small bottle of pure oud oil (3 grams) can cost hundreds of dollars, and the finest wood sells for thousands of dollars per pound.

Real oud vs synthetic oud

Today most oud in perfume comes from two places:

• Plantation oud. Farmers grow Aquilaria trees and deliberately wound them or inject them with fungi to start resin forming. This takes months to a few years instead of decades, and it eases pressure on wild trees.
• Synthetic or "accord" oud. Perfumers rebuild the smell of oud from other materials, often woods, leather notes and smoky molecules. Most affordable "oud" perfumes use these accords.

Neither is "fake" in a bad sense. Accords are consistent, affordable and kinder to wild forests. But if you get the chance, smell a drop of real oud oil once. It is unforgettable.

What oud pairs well with

• Rose: the classic Middle Eastern pairing. Rose makes oud softer and more romantic.
• Saffron: adds a leathery, golden spice.
• Amber and vanilla: turn oud warm and sweet.
• Sandalwood: keeps it creamy and smooth.
• Incense and frankincense: make it even more spiritual and smoky.

Perfumes to try

Start soft, then go deeper:

• Oud Wood by Tom Ford (2007): smooth, polished and easy to wear. The best first step.
• Oud Satin Mood by Maison Francis Kurkdjian: oud wrapped in rose and vanilla. Velvety and sweet.
• M7 by Yves Saint Laurent (2002): the perfume that started it all.
• Oud 27 by Le Labo: darker, smokier and more challenging.
• A pure oud oil from a specialist: for when you are ready for the real thing.

How to wear oud

• Use less than you think. Oud is strong and can last 8 to 14 hours.
• Try it on skin, not just paper. It changes a lot as it warms.
• Give it an hour before deciding. Many people dislike the opening and love the drydown.
• It works best in cooler weather and in the evening, though light rose-oud blends are fine all year.

Who will love it

People who want a bold, memorable scent, anyone who loves smoky or leathery perfumes, and anyone curious about Middle Eastern perfumery. If you are new to it, start with a softened oud like Oud Wood before trying a raw oil.