- Cobb County is a county in the U.S. state of Georgia, located in the Atlanta metropolitan area in the north central portion of the state. As of 2020 Census, the population was 766,149. It is the state’s third most populous county, after Fulton and Gwinnett counties. Its county seat is Marietta; its largest city is Mableton.
- More Sites in Washington (archive.org)
This rockhounding page no longer exists but a partial copy was captured by the Internet Archive in March 2013. Most images and map links are no longer valid but you can get some tips on a few rockhounding sites.