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
Parable of the Pearl Parable of the Pearl The Parable of the Pearl (also called the Pearl of Great Price) is one of the parables of Jesus. It appears in and illustrates the great value of the Kingdom of Heaven. It is the penultimate parable in Matthew 13, just before the Parable of the Dragnet. It immediately follows the Parable of the Hidden Treasure, which has a similar theme. It does not appear in the other synoptic gospels but a version of this parable does appear in the non-canonical Gospel of Thomas, Saying 76. The parable has been depicted by artists such as Domenico