Go out from your house east(better), west(sometimes). When you get to a creek go upstream and look for smooth, flat , black rocks in the creek. Scratch it with a knife, and you should get pure silver. Done it myself, seen it done, but stay in the creeks unless a rancher is a friend and will let you on the property. Rumor is there is a vein. Now around Llano there is some really poor ore you can pick up, including at the old spanish, Los Alamagres mine(the Bowie Lost Mine). Pretty crappy, but it's there.