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I would like to know what to do with crystal like stones, you find around old rock sites or houses? Are they worth anything? Are there gold mines in Texas?

If you find crystals or stones and are wondering what to do with them you can take them to a local geologist at a university or jewelry store for identification. These professionals can help you make an identification of the rock or mineral and tell you if the item is worth money or useful for other applications such as jewelry. I am unsure if there are active gold mines in Texas but you could check with the Texas office of the United States Geological Services for that information.