One of the most valued and expensive tree is the Agarwood or Aquilaria tree. It is an endangered species of plant in the Thymelaeaceae family. It is a wood that cost more than gold. First grade agarwood is one of the most expensive natural raw material in the world.
Agarwood is a fragrant dark resinous wood used in incense, perfume, and small carvings. It is formed in the heartwood of aquilaria trees when they become infected with a type of mold (Phialophora parasitica).