Rock Hound's Delight: Llano and Mason Professional Review and Guide
"This trip is a favorite with rock hounds and outdoor lovers. Continuing from Buchanan Dam, you’ll see more and more granite outcroppings—huge boulders protruding from the rugged land. This entire region is called the Llano Uplift, a geological formation caused by igneous rocks from 40 miles below ground being pushed up to the surface. The Llano area is still a collector’s paradise, with over 240 different rocks and minerals discovered in the region.
The area’s granite, feldspar, graphite, and talc have commercial value, while the more precious yields, such as garnet, amethyst, tourmaline, and quartz— even gold and silver—are sought by eager visiting rock hounds. Rock hounds come to Mason County today in search of topaz, the Texas state gem, which develops in colors ranging from clear to sky blue. Most local topaz turns up near the small communities of Streeter, Grit, and Katemcy, all north and northeast of Mason. Searchers usually find the stones in streambeds and ravines by using picks and shovels to loosen rocks and a wire screen to sift."