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 ...

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 ...

and the differences begin with their main ingredients. Sago is derived from palm trees and tapioca pearls are made from a tuberous root. There's also a dissimilarity in textures, and of course ...