Please help ID found near Needle Point, Brewster County, Texas in ROCKS, MINERALS and FOSSILS Posted December 19, 2020 This could be so many things. It’s too hard to tell exactly what it is from just pictures. I think Bob may be on to something with the quartzite. It does have the appearance of quartzite, which is a metamorphosed quartz sandstone. It also looks like it could be a fairly grainy chert. It could be a number of other things with staining from chemical weathering.