For years, thundereggs have fascinated Oregonians. The state rock is celebrating its 60th anniversary this year. Here's everything to know about the thunderegg and where to find them in Oregon. On the ...

Thundereggs look like regular rocks from the outside, but contain intricate and colorful mineral patterns inside — often made of quartz, chalcedony, or agate. They are nodule-like rocks typically ...

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. Oregon’s ...

Add Yahoo as a preferred source to see more of our stories on Google. For years, thundereggs have fascinated Oregonians. The state rock is celebrating its 60th anniversary this year. Here's everything ...