A sensational collection that reveals the varied geological specimens found in the United States. Collection includes specimens from each of the 50 States. The rock, mineral or fossil selected to represent that state is individually _x001C_keyed_x001D_ for identification. The key also includes a useful fact and a geologic feature for each individual state. Specimen size 1″ x 1″ x 1″. Grades 3-12. Ages 8-18.