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
Pearl Lowe Pearl Lowe Pearl Lowe (born Pearl Samantha Davis), is an English fashion and textiles designer, and former singer-songwriter. She was the vocalist of mid-1990s indie bands Powder and Lodger, which she fronted after a brief period at LAMDA, and as a solo-artist under the name Pearl. Pearl is known for her love of vintage interiors and fashion. In 2001, she launched 'Pearl Lowe', her signature range of lace curtains and cushions. In 2006, Lowe moved to Somerset where she began designing her own bespoke handmade dresses and childrenswear that were sold to Liberty and The Cross in London. She has