In an ancient tunnel, a collection of “cave pearls” was discovered, with some of them containing Greek artifacts from the […] ...

Narrator: That's Tom Moses. He's a gemologist at the Gemological Institute of America where he oversees diamond grading, colored stone identification, and pearl identification. He says that part ...

Researchers have found a "unique" collection of "cave pearls"—some of which contain archaeological artifacts—in an ancient tunnel, a study has reported. Cave pearls are a type of "speleothem ...

A study conducted by Dr. Azriel Yechezkel of the Hebrew University of Jerusalem and his colleagues from the Hebrew University ...