Nestled in the Sierra Nevada foothills due east of Manteca, CA, the BLM’s Red Hills Recreational Management Area is usually bypassed by busy tourists and weekend campers, headed for the scenic vistas of Yosemite and other Gold Country recreation area
Over my decades as a wandering field geologist in the Panoche Hills, I've seen a lot of strange rocks.
Here's a little about my favorite, and first "personal" gemstone.