Book excerpt: With this informative guide, you can explore the mineral-rich areas' of Delaware, Maryland, and Washington D.C., from the beaches to the mountains. It describes the areas' best rockhounding sites and covers popular and commercial sites as well as numerous little-known areas. This handy guide also describes how to collect specimens, includes maps and directions to each site, and lists rockhound clubs. Rockhounding Delaware, Maryland, and Washington D.C. offers a complete introduction to this many-faceted hobby and is an invaluable sourcebook.