California State Parks, which manages more than 340 miles of California’s coastline, is asking the public not to collect any ...

We knew he would be an excellent guide on our agate hunting adventure. We met up with him at a secluded beach on Lake ...

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 ...

Rocks with red skins and a bit of a sheen are ... one that could be a moss agate (another form of Lake Superior without the bands), one that likely was agatized petrified wood.

A German university, Göttingen University, has literally "struck gold" in recent findings from volcanic rocks. A new study of these volcanic rocks from Hawaii, that leaked out from deep under the ...

Popular Michigan agate hunting locations include Whitefish Point, Grand Marais Beach, and Agate Beach. Known for their integrated colors and patterns, collectors are often amazed at agates that wind ...

People come to Oregon from all over the world to hunt for thundereggs, the seemingly unremarkable egg-shaped rocks that hide beautiful patterns of agate, opal, jasper and other gemstones.

Michigan, Minnesota and Wisconsin all feature ancient rocks known as gneisses — metamorphic rocks banded with various minerals — but an analysis determined that the gneiss in northern Michigan ...

Agates are formed from silica solutions filling gas bubbles in lava rocks, creating bands of color. The best time to find agates in Michigan is after a storm. Popular Michigan agate hunting ...

Geologists recently dated the age of Watersmeet gneiss, a type of rock in the Upper Peninsula, as the oldest in the U.S. Here's what to know.