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What is jade's grading system in common language?

A Grade: 100% all natural desirable color, texture, and watery luster. Not all natural jade can be graded as A Grade, and neither can all the 100% natural jade to be priced as A Grade. For a piece of jade to be graded and priced as A Grade, it must have all the above mentioned qualities.

B
Grade: Synthetically enhanced, most of the time from natural coloration, but acid treated for better translucency. The color may or may not fade over time. Mineral impurities bleached out.

C
Grade: Dyed color, mostly from outside. Color will fade within 5-6 years.

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