Up for auction an East Texas door stop rock. A guy at a rock show told me if was a septurian nodule. Nice piece, apparently polishes up real well, the clay looking area takes on a nice look and the quartzy areas polish up to look a lot like citrine. Rock measures 7 inches by 4 inches, and weighs 5 pounds! Or you can just use it as a door stop, like we've been doing! Nice heavy piece, holds a door open or closed even in heavy winds! Either way, it's sure to be a conversation piece! Please feel free to check me out, I have great stuff and excellent feedback.