The term 'OYSTER PRODUCT' can be solved by the crossword solution 'PEARL' (5 letters). Pearls are a type of gemstone that is created inside of an oyster. They are formed when an irritant, such as a grain of sand, enters the oyster and the oyster secretes a substance called nacre to coat the irritant. This process can take several years and the resulting PEARL is a beautiful and valuable product of the oyster.