Operation and Management of Jewelry Enterprises, 42 yuan China Geo University Press.
Related Standards for Jewelry, Jade and Precious Metal Ornaments 135 yuan China Standards Publishing House
Now I just read books on jewelry-related marketing.
Jewelry Marketing 26 yuan Science Press
Jewelry Marketing China Geo University Press 48 yuan
You should also know some basic knowledge of finance.
Basic accounting is some basic knowledge. 20 yuan Science Press.
Cost Accounting 28 yuan Dongbei University of Finance and Economics Press
Finally, you should know a little about psychology.
Sales psychology is a good book, China Renmin University, 32 yuan.