More interesting, perhaps, is the biological process that occurs for the pearls to form. When debris gets trapped in between the shells of an oyster or other mollusk, or when the animal sustains ...

But let's rewind for a second. What is a natural pearl, and how are they formed? Natural pearls form when some kind of irritant, usually a small organism, makes its way into the shell of a mollusk ...

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 ...