First of all, jade is essentially a natural stone with the characteristics of fast heat conduction. When the weather is hot, most people will be exposed to the air when they wear jade. Jade can quickly transfer the heat of human body to the air, making people feel cold. If people still wear jade in the air in winter, I believe this cold feeling will be even more impressive.
Then, jade also has a certain heat storage function. In winter, when people wear jade, they wear it under their clothes. Jade absorbs the heat of human body, but it will not be transmitted to the air quickly because of the shelter of clothes, so it will be stored in jade, which makes people feel warm. If you expose jade to the sun in hot weather, you will find it feels very hot and hot, in the same way. As shown below, this hand wearing a jade bracelet must be pressed inside the clothes when going out:
Not only jade, but also most jade products have this characteristic, and because jade products often have compact crystal structure and fine particles, their heat conduction and heat storage ability is stronger than that of ordinary stones.
On the other hand, compared with metals such as steel, jade such as jadeite is inferior in this characteristic, but the reason is the same-steel always feels colder than wood in winter, and steel feels hotter than wood in summer under the scorching sun, all because the human body feels different because of different thermal conductivity and heat storage performance in different media.