Generally speaking, pearls are white, sometimes with beige or pink luster, and some pearls are yellow, green, blue, brown or black. Black pearls are particularly expensive because they are rare.
The causes of pearls are: fur and carapace are injured, and pearls will be stitched and secreted to the wound. If parasites or epithelial tissues fall into objects (such as sand) inside and outside animals, pearls will not be produced, while artificial pearls are injected with a nacreous core surrounded by an external upper envelope.
Extended data:
Pearl powder classification:
1. Natural pearl powder: it is made by physical methods (such as ball milling, airflow crushing and physical superfine powder technology). It is characterized by not adding any other substances, nor destroying any substances, and maintaining all the nutritional components of pearls.
2. Chemical pearl powder: it is mainly made by enzymolysis or acidolysis, which is characterized by being soluble in water and suitable for people with gastric acid deficiency. The disadvantage is that the nutritional components are incomplete, and there are only one or several functions, so it is difficult to use externally.
Use:
Solving the problem of oily and dead skin, whitening skin can effectively make the skin bright and beautiful, specifically, it can play an anti-aging role by enhancing the activity of SOD, and make the skin fresh, smooth, fair and pleasant. Therefore, pearl powder is an additive of various cosmetics, which can be made into pearl cream, cream, milk, facial cleanser, hair dye, hand cream and so on. Can be used with facial cleanser to wash your face.
Baidu Encyclopedia-Black Pearl