Cultured pearl Cultured pearl A cultured pearl is a pearl created by an oyster farmer under controlled conditions. Cultured pearls can be farmed using two very different groups of bivalve mollusk: the freshwater river mussels, and the saltwater pearl oysters. A pearl is formed when the mantle tissue is injured by a parasite, an attack of a fish or another event that damages the external fragile rim of the shell of a mollusk shell bivalve or gastropod. In response, the mantle tissue of the mollusk secretes nacre into the pearl sac, a cyst that forms during the healing process. Chemically speaking, this
Pearl of Africa Rally its own African Rally Championship event in 1997. As Winston Churchill visited Uganda, he baptised the country as the ‘Pearl of Africa’, that's where this event receives its name from. Some remarkable drivers in the history of Uganda are Sospeter Munyegera, Shekhar Mehta, Satwant Singh, Charlie Lubega, Moses Lumala, Emmanuel Katto and Chipper Adams, amng others. Source: Motor Sport Uganda and African Rally Championship Pearl of Africa Rally Pearl of Africa Rally or Pearl of Africa Uganda Rally is one of the main motorsport events in Uganda. It is part of the National Rally Championship and the FIA African Rally