in California, New Mexico, Oregon, Rocks and Precious Stones, Washington All About THUNDER EGGS (And Where To Find Them!)
in New Mexico, Rockhounding By State, Rocks and Precious Stones Rockhounding In New Mexico! (Complete Guide)
in Arizona, California, Colorado, Nevada, New Mexico, Oregon, Rocks and Precious Stones, Utah, Wyoming Obsidian Adventures: Uncover the Best Places in the U.S. to Find Obsidian