It is quartz, but not sure it should be in La Pryor. Was there more than this? Maybe decorative stones or rocks from other places? It is a really nice find. Run over to Batesville at noon and eat at YOMI's. The ranchers that eat there can probably tell you who, what where, the food is excellent, tell little Yomi Bueno the old guy who named her Yomi Muy Bueno says hi. The ranchers are young, Aggie grads and they spend a lot of time digging in the ground. They will know and you'll eat good. By the way, Welcome to TNet