This small underground museum and shop displays of minerals and fossils, local as well as rare and unusual, some from collections of prominent museums and universities. The cases are well-arranged, well-lighted, clean, and easy to see. The staff was extremely helpful and knowledgeable, showing me references and photographs to answer my questions, and also demonstrated tools and techniques for opening geodes. The gift shop sells books on rocks and crafts made locally, often using semi-precious stones. The staff seemed to know the crafters and their particular techniques. Do not miss this!