At a glance
| Water | Saltwater |
|---|---|
| Mollusk | Northern quahog clam, Mercenaria mercenaria |
| Where | East coast of North America, especially New England, and the California coast |
| Shapes | Varied |
| How it starts | None: natural |
| Growing time | Natural |
Quahog pearls form in the northern quahog clam, Mercenaria mercenaria, found along the east coast of North America, especially New England, and along California's Pacific coast (GIA).
What they look like
Quahog pearls are non-nacreous, with a porcelain-like look. They come in white, light gray and various purples, and the purer colors are the most sought after (GIA).
Why they are rare
Finding one is uncommon. Clams are often shucked by machine, so most pearls are lost or destroyed, and pearls that do reach diners have usually been cooked, which can damage them (GIA). If you find one in a clam, do not cook it, and keep it dry and away from heat.
Frequently asked questions
What is a quahog pearl?
A natural, non-nacreous pearl from the northern quahog clam, usually white, light gray or purple (GIA).
I found a pearl in a clam. Is it valuable?
It may be a genuine natural pearl. Pearls that reach diners have usually been cooked, which can damage them, and GIA notes that purer colors are the most sought after. A gem lab can identify it.
Questions from readers
Question about Quahog pearls? Ask it here. We answer the useful ones on this page.
Ask a question
Sources
Checked October 22, 2026. How we check our facts.