Among gold jewelry, pure gold jewelry is soft in texture, with teeth marks, easy to bend, golden in color, pure, soft and heavy in hand. K-gold jewelry has a slightly hard texture, no bite marks, and the color is yellow with white, and with the decrease of length, the white gradually increases and the yellow gradually becomes lighter. Gold jewelry feels less heavy than pure gold jewelry. In addition, pure gold and K gold jewelry are stamped. The seal on the gold jewelry is marked with the word "gold" and the English letter "water G" to indicate the texture. When indicating the gold content, the words "99" or "24K" indicate pure gold jewelry, and K gold jewelry indicates the corresponding K number according to the different gold content. For example, K gold jewelry marked "18K" has a gold content of 75%. In addition, there are seals on the jewelry, indicating the origin of different manufacturers. Real gold jewelry, with standard printing, integrity and clarity, is an important identification mark.