While pearl is more often than not a product from nature, it is difficult to control every pearl are as beautiful and colorful as we anticipate, therefore, people will use some artificial method to change or modify the appearance of pearls. Only by this way, the most beautiful sides of pearls can bring to us. This is very similiar to the process of a jeweler cutting a raw diamond rocket to get a perfect diamond. Pearl treatements include:
1. Bleaching
Remove, lighten (make whiter) or alter (from dark to light) color by means of chemical and/ or physical agents or light. This process can make the color look more even.
2. Buffing
Remove organic residues from the surfaces of natural and cultured pearls following harvest.
3. Polishing
This technique is applied to natural and cultured pearls to remove some surface blemishes and increase luster.
4. Coating
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