Oud is a rare and highly valued fragrance ingredient extracted from the resinous heartwood of agarwood trees. When these trees are naturally infected, they produce a dark aromatic resin that is later distilled into oud oil (https://sabysaeedanwar.com/collections/oud). The result is a deep, complex scent profile that is woody, smoky, earthy, and slightly sweet, often evolving beautifully as it settles on the skin. Because of its rarity and long natural formation process, oud is considered one of the most expensive materials in perfumery and is often called "liquid gold." It is widely used in premium perfumes, attars, and fragrance oils, prized for its powerful longevity, richness, and luxurious character.