2. The original jade stone is called gambling stone, and no instrument can quickly judge whether it is "Baoyu" or "defeated" through this shell. Jade is wrapped in a weathered leather bag when it is mined, so it is impossible to know whether it is good or bad. Jade whose quality can only be known after cutting is called gambling stone.
3. Jiangxi, an authoritative appraisal institution with national qualification certification, full name: Jiangxi Precious Metal Jewelry Quality Supervision and Inspection Station. Geology is located atNo. 10 1 Hongdu Middle Avenue, Nanchang City. Generally, it costs 40 yuan per piece, and it takes two hours to issue the certificate. Many certificates are issued in batches. Generally, more than ten certificates are needed for each certificate in 20 yuan.
4. Look at jade with good color. The color is pure and will not be mixed with other variegated colors. The color distribution is not only bright but also uniform. Under the irradiation of light, the transparent and delicate A-grade jadeite will reflect beautiful light, making people feel that jadeite is crystal clear and beautiful.
5. Distinguishing the true and false jadeite original stone can be illuminated with strong light. Under strong light, the natural jadeite stone will show a gorgeous and natural color, green and clear, with a gradual relationship with the surrounding parts. The original stone of fake jadeite is gray and unnatural, with irregular green trend, weak luster and dark reflection.