Agarwood

Agarwood, aloeswood, eaglewood, gharuwood or the Wood of Gods, commonly referred to as oud or oudh (from Arabic: عود, romanized: ʿūd, pronounced [ʕuːd]), is a fragrant, dark and resinous wood used in incense, perfume, and small hand carvings.

With thousands of years of known use, and valued across Muslim, Christian, and Hindu communities (among other religious groups), oud is prized in Middle Eastern and South Asian cultures for its distinctive fragrance, utilized in colognes, incense and perfumes.

[2] The varying aromatic qualities of agarwood are influenced by the species, geographic location, its branch, trunk and root origin, length of time since infection, and methods of harvesting and processing.

[3] Agarwood is one of the most expensive woods in the world, along with African blackwood, sandalwood, pink ivory and ebony.

In the perfume state, the scent is mainly distinguished by a combination of "oriental-woody" and "very soft fruity-floral" notes.

The incense smoke is also characterised by a "sweet-balsamic" note and "shades of vanilla and musk" and amber (not to be confused with ambergris).

[7] As a result, agarwood and its essential oil gained great cultural and religious significance in ancient civilizations around the world.

[10] In the Hebrew Bible, "trees of lign aloes" are mentioned in The Book of Numbers 24:6[11] and a perfume compounded of aloeswood, myrrh, and cassia is described in Psalms 45.

[12] Dioscorides in his book Materia Medica (65 CE) described several medical qualities of agarwood (Áγαλλοχου) and mentioned its use as an incense.

Even though Dioscorides describes agarwood as having an astringent and bitter taste, it was used to freshen the breath when chewed or as a decoction held in the mouth.

He also writes that a root extract was used to treat stomach complaints and dysentery as well as pains of the lungs and liver.

[13] As early as the third century CE in ancient Viet Nam, the Chinese chronicle Nan zhou yi wu zhi (Strange things from the South) written by Wa Zhen of the Eastern Wu Dynasty mentioned agarwood produced in the Rinan commandery, now Central Vietnam, and how people collected it in the mountains.

The famous piece of wood still remains in Japan today and is showcased less than 10 times per century at the Nara National Museum.

[3][14] Starting in 1580 after Nguyễn Hoàng took control over the central provinces of modern Vietnam, he encouraged trade with other countries, specifically China and Japan.

[16] Xuanzang's travelogues and the Harshacharita, written in seventh century AD in Northern India, mentions use of agarwood products such as 'Xasipat' (writing-material) and 'aloe-oil' in ancient Assam (Kamarupa).

It is to this day still used in traditional Chinese herbal medicine where it goes by the name of Chén Xiāng - 沉香 - Literally meaning 'sinking fragrance'.

[41] CITES also provides that international trade in agarwood be subject to controls designed to ensure that harvest and exports are not to the detriment of the survival of the species in the wild.

Cultivated aloes/agar wood
Uninfected aquilaria wood lacking the dark resin
Antique agarwood beads with inlaid gold, late Qing dynasty, China. Adilnor Collection, Sweden.
Aquilaria tree showing darker agarwood. Poachers had scraped off the bark to allow the tree to become infected by the ascomycetous mould.
Steam distillation process used to extract agarwood essential oils