>>614524I don't have any specific location tips, and I feel like it's a waste to look down there for gold because of nocal, but I recommend looking around the dunes area for obsidian, jasper, petwood and chert. I've found top quality red, green, yellow and brown jasper down there, as well as jaspagate/jasper chert mixes, and pretty nice chunks of petwood scattered around, a couple of head sized ones which are decently valuable for landscaping(50-100 bucks). Only low quality obsidian and chert, though I know there's good quality obsidian out there, and I also found a couple of chert/jasper sources that I didn't dig into that might have yielded some crazy shit so I know they're out there.
With resources like that, you're looking for large pieces with minimal fractures and imperfections, and lots of them, but good sized chunks of chert, jasper, petwood and especially obsidian sell well, and easily if you have boxes full of them.