Since it's born out of molten rock, obsidian is only found in volcanic regions of the world, including in parts of the United States, such as the Mountain West, Southwest, California, Oregon ...

Oregon's state rock is celebrating its 60th anniversary this year. Here's everything to know about the thunderegg and where ...

Gregory Creek, just east of Whitewater Ridge, Oregon. Both the Kingcome Inlet and Garibaldi obsidian are of only moderately good quality. This is because they have some larger crystals in the rock ...