Cultured pearl is calcium carbonate and a fibrous protein called conchiolin. As the nacre builds up in layers of minute aragonite tablets, it fills the growing pearl sac and eventually forms a pearl. Natural pearls are formed by nature, more or less by chance. On the other hand, cultured pearls are human creations formed by inserting a tissue graft from a donor oyster, upon which a pearl sac forms, and the inner side precipitates calcium carbonate, in the form of nacre or "mother-of-pearl". The most popular and effective method for creating cultured pearls are made from the shells of freshwater river mussels
Pearl Street Schoolhouse Pearl Street Schoolhouse The Pearl Street Schoolhouse, also known as District 11 Schoolhouse, is located south of the junction of Awosting and Decker roads in the Town of Shawangunk, New York, United States. It was built around 1850. The schoolhouse name is derived from the tendency of the Jansen family to speak often of Pearl Street in what is today Lower Manhattan. The homes of early settlers Thomas and Johannes are within a mile (1.6 km) of each other. Eventually, the whole area they lived in became known as Pearl Street. The building, now a private home, was added to