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 of Africa (film) The Pearl of Africa (film) The Pearl of Africa is a documentary film directed by Johnny von Wallstroem, it focus on the life of Cleopatra Kambugu, a Ugandan born woman who decide to live openly as a trans woman despite hostility towards same-sex relations in the country. The phrase Pearl of Africa is attributed to Winston Churchill who used it to describe Uganda's flora and fauna. In 2014, when the protagonist and her lover decide to settle down quietly, Uganda passed a homophobic law; later in the year, a Ugandan tabloid, "Red Pepper" outed Kambugu which eventually forced the lovers