Color: especially green. Strong yang is the top grade; The rest are second.

Species: Fine texture, compactness and uniform brightness are good species; The second type is coarse texture, loose structure and visible particles.

Water: High transparency and bright water permeability mean good water head. Generally, good plants have good heads. Poor transparency, opacity is suitable for dry head.

Defect: no crack and no defect is the top grade. With black, dirty and cracked vitamins times. Few jadeites produced in nature are perfect.

Technology: exquisite design, fine workmanship and careful polishing are better. On the contrary, it is second.

The State Bureau of Technical Supervision issued three types of technical standards according to the jadeite jewelry on the market at present, namely, A, B and C goods. This standard does not represent the grade of jadeite. A, B and C products of jadeite are briefly introduced as follows:

A goods: natural jadeite raw materials finished products. Its texture and color have not been artificially modified, maintaining its natural essence. This kind of jewelry will be more moist and shiny when worn for a long time. High-grade jadeite has value preservation and investment. There is no need to add the words "natural or A goods" when selling signs. If the logo is "Emerald Bracelet", it must be natural or A goods.

B goods: raw materials or semi-finished products of jadeite are dirty, gray-black, dry green or dark, which can be treated by manual chemical and physical methods to increase its transparency, make its appearance better, be transparent and bright, and make its original color look better. This artificial strong corrosion treatment destroys the original structure of jadeite and makes it loose, so it needs to be filled with organic glue for cementing. Thereby reducing the quality of jadeite and changing the original optical and physical properties of jadeite. Lost its real value.

Goods C: On the basis of treatment B, the colorless or yellowish jadeite is artificially dyed into gorgeous and beautiful colors. The added color is red or green. For BC goods, the national standards clearly stipulate that the name of the goods sold must be marked with the words "Yuyou (Disposal)", otherwise it is fraudulent to confuse the fake with the real.

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