How Pearls Form and Which Species Makes Them

Learn how pearls form and which species make pearls. These natural lustrous gems start as irritations under the shells of wild or farmed mollusks.

Pearl Knowledge

Why do pearls form inside clams? - Quora

Carbonate Compensation Depth (CCD)

Why Do Oysters Make Pearls?

Pearl Farming around the World

Stiff Pen Shell (Atrina rigida)

How Pearls Form and Which Species Makes Them

Interesting and Eye-Opening Facts About Freshwater and Saltwater Pearls — ANDREA LI

Introduction to Gastropods

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Natural Shell Blisters and Blister Pearls: What's the Difference?

Introduction to Gastropods