You can pay attention to the information of some official websites, such as IGI and GIA. There will be some courses and tuition fees, but the difficulty of each certificate is different. A friend of mine said that IGI's test papers are all in English, and they should be sent abroad for inspection after answering the questions. If it is sent back, it means that it has passed, and GIC in China will be simpler. However, you have to take two diamond certificates and gem certificates to change the professional qualification certificate of appraisers, but you use GIC.

Reference address:

Introduction of IGI, FGA and GIA Gem Certificate Examination

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