How is a Pearl Formed?

A pearl starts out as a foreign object like a parasite or a piece of shell that gets stuck in an oyster’s soft inner body where it can’t be expelled. To ease the discomfot of the irritant, the oyster starts to produce and secrete a smooth, hard crystalline substance called nacre around the irritant in order to protect itself. As long as the foreign object stays lodged, the oyster will continue to secrete the nacre. Over time, the object will be completely encased in a shiny white casing, giving you a pearl