A thought on Burning incense: "....The fungus and decomposition process continue to generate a very rich and dark resin to form within its heartwood. This is the preferred resin used in making fine Japanese incense. The resin created as an immune response makes the most sacred oil on the planet . As you can see the wood is extremely rare and often very difficult to obtain, as well as being quite expensive. The best quality is Kyara. Kyara comes in four types: Green, Iron, Purple, and Black.
There are many stories about aloeswood being buried under the ground for hundreds of years. This legend comes from an old Chinese book on incense, but today most aloeswood comes from infected trees that, although in the process of decaying and dying, are indeed still standing. However, sometimes the roots become infected with the fungus and these can be found underground....."