The Prince Georges County Department of Parks and Recreation
Clearwater Nature Center - 11400 Thrift Road, Clinton, MD. 20735 - (301) 297-4575.
The Clearwater Nature Center has two clubs for people interested in rocks and minerals. The Rock & Mineral Club goes on monthly field trips to collect rocks, minerals and fossils while the Clearwater Lapidary Club meets monthly to pursue gem cutting and jewelry making interests.