The protrusions on the smooth surface of gold ornaments may be caused by the carving process. Chiseling is a traditional metalworking technology. By chiseling decorative patterns or characters on the metal surface, various patterns and patterns are presented. In this process, some bumps may be generated.

In addition, if this is due to the quality problems of gold ornaments, such as impurities or bubbles embedded in the production process, it may also lead to bumps on the surface.

If you are in doubt about the quality and source of gold jewelry, it is recommended to consult a professional jewelry appraisal agency.