The Gemological Institute of America uses X-rays to tell if a pearl is natural or cultured. If you look closely at these two images, you can see the difference. Moses: Think about the layers of an ...

said the surge in demand and subsequent rise in prices for saltwater pearls has drawn attention to the fundamental difference ...

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 ...