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
The Pearl (novel) The film was also released by RKO in 1947 as a co-promotion with the book. "The Pearl" was loosely adapted in 2001 for a film directed by Alfredo Zacharias and starring Lukas Haas and Richard Harris which was released directly to video in 2005. Family-One of the major themes in the novel is family. Throughout the novel, the plot discusses how the family lives before and after the pearl. It is constantly the focus of the plot and many of the decisions are based on what would be best for the family. For example, the first thing that Kino desires