Agarwood,aloeswood,eaglewoodorgharuwoodis a fragrant darkresinouswood used in incense, perfume, and small carvings. It is formed in theheartwoodofaquilariatrees when they become infected with a type of mold (Phialophora parasitica). Prior to infection, the heartwood is odorless, relatively light and pale colored; however, as the infection progresses, the tree produces a dark aromatic resin, calledaloesoragaras well as Oud, or Oodh in response to the attack, which results in a very dense, dark, resin-embedded heartwood. The resin-embedded wood is valued inIndian-North Easternculture for its distinctive fragrance, and thus is used forincenseand perfumes. Its name is believed to have first and foremost Sanskrit origin, formed from ‘Aguru’. The 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.