I gained new knowledge after reading: only by understanding agarwood can one better appreciate it!

Agarwood is hailed as the "relic in wood" and "diamond in plants", embodying the essence of a century. Its production is scarce. In recent years, agarwood bracelets have become increasingly popular among the public. These bracelets exude an elegant charm, with a subtle yet refreshing scent. High-grade agarwood bracelets, besides serving as high-end accessories, are also collectibles with potential for appreciation. Therefore, they are greatly favored by people from all walks of life. Regular exposure to agarwood not only aids health but also prolongs life. Agarwood, also known as "sinking incense", is a solid condensate formed by a special type of fragrant tree, combining oil (resin) and wood components.

4. Only mature trees that have reached a certain age are capable of producing agarwood. Without wounds or external stimuli, mature trees will not produce agarwood.

5. Due to differences in tree age, wounds, and growth time, the oil content of agarwood varies, leading to different densities. Higher-quality agarwood can sink in water due to its high oil content. Therefore, in general, whether it can sink in water is used as a sign of the quality of agarwood. (Note that it is sinking in water, not water sinking.)

6. Personally, I believe that agarwood harvested from living trees is referred to as "raw" or "live knot", while that harvested from dead trees is known as "mature knot". Whether raw knot or mature knot is better is subjective and depends on the specific quality. However, generally, raw knot contains moisture, and it will become lighter after the moisture evaporates.

7. Mature agarwood can be roughly divided into three types: water-sinking, earth-sinking, and fallen wood. If an agarwood-bearing tree is submerged in water or buried in a marsh for many years, the tree will decay, but the agarwood inside will not decay and its properties will change, which is known as water-sinking. If the tree falls on the ground and is buried in soil due to mountain floods or rainwater, it naturally becomes earth-sinking. If the tree falls on the ground and is neither submerged in water nor buried in soil, it is known as fallen wood. However, currently, except for the red clay agarwood of the Huian variety, which is clearly earth-sinking, it is difficult to distinguish other mature agarwood materials from their appearance and taste as water-sinking, earth-sinking, or fallen wood. Therefore, it is not particularly meaningful to distinguish between water-sinking, earth-sinking, and fallen wood.