In a full day's search on the last day of March, Mike Jacobs of Monticello and I found 121 agates. That seemed a lot to an amateur like me, whose agate hunting has been largely confined to looking ...

Thanks to fire and ice, treasures abound. This summer, agate collectors are on the hunt in eastern Minnesota and western Wisconsin, searching for rocks that can fetch as much as thousands of dollars ...

SAUK RAPIDS, Minn. -- For Lyndon Johnson, treasures can be found anywhere -- one just has to train his or her eye. "I know when to look and where, and where to look when," Johnson said with a smile.

Known for their colors and patterns, collectors are often amazed at agates that turn up on Upper Peninsula lakeshores, with some known to be up to 20 pounds, according to the Michigan Department of ...

Eleanor has an undergraduate degree in zoology from the University of Reading and a master’s in wildlife documentary production from the University of Salford.View full profile Eleanor has an ...

The geochemistry of agate and chalcedony in volcanic rocks represents an intricate record of silica precipitation and crystallisation processes occurring under variable thermal and chemical conditions ...

This is the amazing lump of volcanic rock discovered in Brazil which looks like Sesame Street's Cookie Monster. The unusual rock was recovered from the Rio Grande dol sul region near Soledade in ...