Known for their integrated colors and patterns, collectors are often amazed at agates that wind up on Upper Peninsula lakeshores. Known for its diversity and beauty, an agate stone is a form of quartz ...

Unusual rocks and minerals are fun to collect, but when you stumble upon a rock formation that looks like a Muppet, that's extra special. Check out this blue agate. When split in half, it looks a lot ...

Two women were moving rocks on a beach along the Yellowstone River the other day. “Did you lose something?” I asked. “No,” they replied. They were looking for agates. You may have seen agates in gift ...

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 ...

Mickey (left), Lorna and Adeline Rasinski look at rocks at a vendor booth Sunday at the Cuyuna Rock, Gem and Mineral Society's agate and mineral show at the Crow Wing County Fairgrounds. (Kelly ...

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 ...

They have an otherworldly glow, often blue as the sky, but sometimes tinted with the lavender of twilight. And while there are other blue agates in the world, there is only one Ellensburg Blue, as the ...

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 ...