Pearls are made up of a variety of polysaccharides, proteins, minerals and proteins. Many of these are also beneficial for the skin. In terms of the cosmetic benefits of products containing pearls, they may offer:

oil control
anti-ageing and rejuvenation
exfoliating and anti-acne benefits
brightening

https://stylestory.com.au/blogs/style-story/pearl-korean-beauty-products