Divided into theory and practice.
The theory is memorizing, desperately memorizing, with a perfect score of 100 and a passing score of 75, so memorizing is still very important.
The way to do this is to give you 20 gems, all of which are ordinary gems, so that you can distinguish the varieties and attributes.
The best way to learn is to receive training from professional teachers and training institutions. Many certificates have registration conditions, such as GAC.
1. Cultural background: College degree or above or equivalent.
2. Professional foundation: one of the following three situations:
(a) engaged in gem identification or gem-related rock and mineral identification for more than 3 years;
(2) Bachelor degree or above in gemology;
(3) Those who have obtained the qualification certificate of gem appraisal issued by relevant international organizations.
The above items must be certified by the work unit or local gem association or a copy of the certificate provided by myself.
I hope the above will help you.