Pearl or parasite enters a bivalve mollusk and settles inside the shell. The mollusk, irritated by the intruder, forms a pearl sac of external mantle tissue cells and secretes the calcium carbonate and conchiolin to cover the irritant. This secretion process is repeated many times, thus producing a pearl. Natural pearls come in many shapes, with perfectly round ones being comparatively rare. Typically, the build-up of a natural pearl consists of a brown central zone formed by columnar calcium carbonate (usually calcite, sometimes columnar aragonite) and a yellowish to white outer zone consisting of nacre (tabular aragonite). In a pearl cross-section
Parable of the Pearl to be Jesus. There have been several depictions of the New Testament parable in art, including works by Domenico Fetti, John Everett Millais, and Jan Luyken. The parable is referenced in Nathaniel Hawthorne's novel "The Scarlet Letter" on page 82: "But she named the infant 'Pearl,' as being of great price- purchased with all see had,- her mothers only treasure!" Parable of the Pearl The Parable of the Pearl (also called the Pearl of Great Price) is one of the parables of Jesus. It appears in and illustrates the great value of the Kingdom of Heaven. It is the penultimate