A goods are pure natural jadeite, only carved and polished. There is no chemical treatment, no artificial forgery such as high temperature and high pressure. It is a natural color, which is called "positive color" or "true color" without dyeing or electric color. Visually, the texture is delicate, the color is soft and the stone lines are obvious; Slight impact, crisp and pleasant voice; It feels very heavy and is obviously different from other stones. It is characterized by a density of 3.32-3.34g/cm3, a refractive index of 1.66, a glass luster, a fiber interwoven structure under enlarged observation, and no fluorescence under ultraviolet lamp. The appraisal certificate indicates "jade" or "natural jade".

Goods B will have jadeite with black spots, commonly known as "dirty". Soaking in strong acid for corrosion will destroy the molecular structure of jadeite, remove "dirty" and "cotton" to increase transparency, and then inject epoxy resin or substitute filler into the microcracks caused by strong acid corrosion with high pressure to fill them, reinforce the cracks and increase transparency. Slight impact, muffled sound, no crisp sound of A goods. At first glance, the color of B goods is good, but after careful observation, the color is in a daze and full of evil spirits. When observed under the lamp, the color transparency is weakened. B goods will gradually lose luster and crack after two or three years because of the destruction of the original quality of jadeite by strong acid, which is harmful to human body if worn for a long time. The appraisal certificate indicates: "Emerald (Treatment)".

C the goods are completely artificially colored. Color is not right and evil. Careful observation shows that the color does not exist naturally in jadeite, but is filled in the cracks of minerals, with a network distribution and colorless roots. Observing with Charles filter, green turns red or colorless. Wipe with strong fading spirit, the surface color can be removed or turned brown. Because of the injection of dyes, long-term wear is not good for your health. The appraisal certificate indicates: "Emerald (Treatment)".

After B+C goods are soaked in strong acid and corroded, they are colored while filling, that is, B goods are treated and C goods are treated at the same time. The appraisal certificate indicates: "Emerald (Treatment)".

D goods pretend to be jadeite and other varieties, which are divided into jadeite and glass and plastic. Jed. That is, other jadeites pretend to be jadeites. There are mainly Thai jadeite and Malaysian jadeite, Nanyang dushan jade, Qinghai jadeite, Miyu, Australian jadeite and Dongling stone. The differences between jadeite and jadeite are as follows: First, the hardness is low; Second, the density is low and the luster is weak. Glass, plastic. Most of these substitutes are dull and ugly, and their luster is very weak. The relative density is very light, the hardness is low (it can be carved with nails), and there is no cold feeling. It can be seen that only A jadeite is a natural jadeite, which has wearing significance and collection value, while B, C and D jadeites can all be called fakes.