Pearls are made by marine oysters and freshwater mussels as a natural defence against an irritant such as a parasite entering their shell or damage to their fragile body. The oyster or mussel slowly ...

[Photo/Xinhua] HAIKOU — In the waters of a southern Chinese island, scores of palm-sized pearl oysters hang tidily on the breeding cages. These oysters, scientifically known as Pinctada maxima ...

Oysters are the primary producers of pearls, clams and mussels can also create pearls, though this is much less common. Most pearls come from oysters, which thrive in both freshwater and saltwater ...

Pistol is implying that he will use violent means to find his fortune, much like breaking open an oyster to seize its pearl. But the expression’s meaning has evolved over the years and has come ...