Only oysters of the Ostreidae family can make pearls, but many other types of mollusks can produce these gems, such as ...

Nacre can form naturally around almost any irritant that gets inside the shell, creating some very unique and precious pearls. Other bivalve molluscs and gastropods can produce pearls, but these ...

A routine fossil-hunting trip turned into a groundbreaking discovery for a pair of researchers when they stumbled upon a rare ...