The clam that it came from is a northern quahog called Mercenaria mercenaria, and it usually produces porcelain-like pearls ...

What's inside a clam? A retractable foot, a siphon for sucking up water, powerful muscles, and, sometimes, a pearl. And you thought oysters were fancy. Following is the transcript of the video.

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 ...

Pearls are the result of a mollusc's reaction to irritants ... These translucent animals are known to swim inside clams and oysters to hide from predators. However, for the individual that concealed ...