TEXAS ROCKS & FOSSILS
Texas plume agate is found in colors from black through a virtual rainbow of other colors. West Texas. Also see numbers 17, 18, and 30. 27. Rock gypsum is a fine-grained, translucent to opaque stone of-ten found in layers along the canyons of the Texas High Plains. 28. Coiled gypsum on cinnabar. Gypsum is a soft, common mineral