Jade harmful to health: most jade can be used for health preservation, but very few jade is harmful or has a negative impact on health. For example, the bloodstone in jade contains cinnabar (Cinnabar), which is mercuric sulfide. Although its physical and chemical properties are relatively stable, it still has certain risk to human body. Generally speaking, it is not suitable to contact the human body for a long time, but as a decoration or seal for appreciation. In addition, all kinds of artificial jade are also harmful to human body. Most jade treatment methods will use strong acid to soak and fill with pigments or artificial organic substances, and the residual acidic substances, pigments and reaction products of organic substances and acidic substances are harmful to human body. The antique treatment of guqin color will be treated with hydrofluoric acid, nitric acid, sulfuric acid, hydrochloric acid and other strong acids, and then a layer of floor paint, crystal paint or epoxy resin will be coated on the surface of fake ancient jade.
Hao, director of the Department of Occupational Poisoning Medicine, Chaoyang Hospital, Beijing, believes that the interaction between resin and strong acid is easy to cause irritation, and contact dermatitis will occur after contact, with symptoms such as redness, tingling, itching and peeling. People with sensitive skin are most prone to symptoms.
Jade with the best quality: Among the jade materials found at present, jadeite and Hetian jade have the most stable comprehensive performance, the highest price and the largest appreciation space. Jade is divided into warm jade and cold jade. Of these two kinds of jade, jade is cool and belongs to cold jade, while Hetian jade is warm and belongs to warm jade.
Oriental mortals' favorite jade: Although there are many kinds of jade, some people like and prefer all kinds of jade. Among many kinds of jade, jadeite and Hetian jade are the most popular among oriental mortals. Jade is known as the "king of jade", with high hardness (6.5-7), fine texture and good polishing performance, which is an important reason why it is deeply loved by people and has high economic value. Hetian jade is white, soft and moist. Although its luster is not as dazzling as jade, its softness is very charming.