The purplish shells of quahogs, treasured in the past by Native Americans, now appear alongside gold, mother-of-pearl and onyx. By Jill Newman For centuries Native Americans treasured quahog shells, ...

A pearl does not begin as something precious. It begins as a problem. Inside an oyster, a tiny particle slips in and settles where it does not belong. It might be a parasite, a rough fragment, or ...

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