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What are the finish quality requirements for freshwater pearls?

time:2022-03-30 source:sznbone Views:


Quality requirements for the finish of freshwater pearls:


Flawless: The surface of pearls is smooth and delicate when observed with the naked eye, and it is extremely difficult to observe surface flaws.


Slight blemishes: There are very few blemishes on the surface, like pinpoints, which are difficult to observe with the naked eye.


Minor flaws: There are minor flaws that are easy to see with the naked eye.


Imperfections: Imperfections are noticeable, occupying less than a quarter of the surface area.


Heavy defects: The defects are very obvious, seriously occupying more than a quarter of the surface area.