The incenses can be done with various materials, the ones used in this incense are really unique, giving it an incomparable scent and a making it very costy.
Known as Eagle Wood, Aloe Wood, Agar Wood or Jinkho, it is a resin produced by a plant: Aquilaria Agallocha or Aquilaria Malaccensis Lam.
When the plant reaches a certain age it can be attached by particular mushrooms and then it secretes a resinous substance with a woody amber scent. It's impossible to re-create this fragrance artificially because the compounds would be extremely expensive.