Yep, welcome! That is pretty neat. The general Lassen area up that away was beautiful as I recall-lots of volcanics to be amazed by but I do believe some non-volcanics also.   As Tony requested above some additional photos/angles with a scale of some sort to guage its relative size will help. I have some crazy similar small blobs that have banding but from around here (Florida) and I always wondered if they were not worn chert pebbles but something organic/boney/critter based.