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
The Pearl Report The Pearl Report The Pearl Report is a public affairs programme aired on TVB Pearl from 1 April 1988 to 25 June 2018. The show mainly deals with current affairs in Hong Kong, although there are also stories concerning wider regional and international issues, often produced abroad. Locations covered include the United Kingdom, the United States, Australia, Germany, Russia, Malaysia, Canada, Oman, Vietnam, Thailand, Japan, the Philippines, the United Arab Emirates and all different parts of China. A broad spectrum of topic areas is covered on the Pearl Report, including political, social, health, education, human rights, economic and sport-related issues.