Nacre is composed of the mineral aragonite with an organic binder called conchiolin. The thin layers of nacre make a kind of diffraction grating by which light must pass. This makes a pearl's unique area luster. Dyeing is likewise typical. Seek out indications of this cure around a pearl's drill https://zanesiuhu.total-blog.com/little-known-facts-about-mens-pearl-jewellery-41811299