The main component of pearls is calcium carbonate, accounting for 82-93% of the total. In addition, pearls also contain 4- 14% protein and 2-4% moisture, so pearls are relatively easy to wear. Generally speaking, pearls and precious stones are not directly worn together, but are usually inlaid. If you want to string it into a necklace, you have to separate it. As shown in the picture, no scratches and no pearls.