Oud

Oud, also known as agarwood, is derived from the Aquilaria tree when it becomes infected with a specific type of mold. This infection triggers a defensive resin production, creating the dark, fragrant heartwood. The most prized oud comes from trees in Southeast Asian countries like Cambodia, Vietnam, and Indonesia. Extraction is typically done through steam distillation or CO2 extraction of the infected heartwood, making it one of the most expensive natural ingredients in perfumery.