Video: Pearl formation process in nature

Boys secrete nacre wraps of foreign objects into the body, over many years creating pearls of various shapes and sizes.

Pearl.

People think that pearls come from sand grains, but the process is not so simple. Here's how pearls are formed.

It all starts when a strange object enters the son. To protect themselves, boys begin to cover objects in layers of nacre minerals.

After many layers overlap each other for 2 years, pearls are created.

Pearls come in many shapes and colors, but black is only available in the South Pacific. But due to high demand, the jewelry industry has developed a method of producing artificial pearls. It takes a lot of effort to create a small pearl.