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What professional jewelry appraisal books are there?

Gemmology Course-China Geo University Press-Author: Li Yali and Li Liping (entry-level GIC exam book)

Systematic Gemmology-Geological Publishing House-Author: Li (major, required by the state)

There are other books, such as FGA's professional jewelry books and GIA's professional books (international level, FGA and GIA exam books, generally mailed directly from Britain and the United States).