Agar wood, also known as oud, oodh or agar, is dark resinous heartwood that forms in Aquilaria and Gyrinops trees when they become infected with a type of mould. Prior to infection, the heartwood is relatively light and pale colored; however, as the infection progresses, the tree produces a dark aromatic resin in response to the attack, which results in a very dense, dark, resin embedded heartwood. The resin embedded wood is commonly called gaharu, jinko, aloeswood, agar wood, or oud and is valued in many cultures for its distinc...