AGARWOOD which is also known as liquid gold is one of the most expensive woods in the world. Agarwood belongs to the family of Aquilaria sp and it is native to South East Asia. This tree is very unique because it can produce a type of oil with fragrance which is known as oud oil. Initially, there will be a resin formation and the oud oil will be extracted from the esin. Resin formation occurs as a response to internal injury or infections on the stem.
Oud oil becomes very expensive because