Oud ranks highly as one of the earth's most costly raw resources as it requires many hundreds of decades to produce the resin. Additionally, the aquilaria tree is rapidly depleting as a result of above-harvesting and habitat reduction. In the center East, oud is called "black gold" Voelkl shares. https://oud-ispahan89888.blogdosaga.com/35283152/everything-about-oud-cadenza