Rock/Mineral Collection, Usa. 50 State Specimens.

This extensive collection matches the breadth and grandeur of the geology of our 50 states. Includes specimens representing each state, individually keyed for identification. Also includes an interesting fact about that state's geology. Specimens are about 1/2 - 1" and come in a 14" x 7-1/4" x 1-1/4" vacuum form tray.