In fact, the "three noes" of jewelry and Wan Wen circle are the quality evaluation standards gradually summarized by everyone in pursuit of high standards. In jadeite, it often refers to artificial glue injection dyeing without defects or cracks. In terms of wood and bodhi, it often means no crack, no shade and no color difference. According to the difference of each category, the statement of "three noes" is also slightly different.

Hetian jade: no cracks, no dyed skin and no impurities.

Turquoise: not optimized, not cracked, not dyed.

Nanhong: no cracks, no crystals and no black spots.

Crystal: no crack, no impurity, no dyeing.

Emerald: no cracks, no glue and no impurities.

Beeswax: no baking color, no impurities and no cracks.

Lapis lazuli: no white, no gold and no cracks.

Mammoth ivory: No skin, no core and no smile (cracking).

Xingyue: there is no partial moon, no shade and no color difference.

Wan Wen Walnut: No yellow tip, no shadow and no color difference.

The whole product means: perfect.