Rocks, minerals, fossils - collecting and learning about them is a fascinating hobby. Join the Gaithersburg Community Museum and the Gem, Lapidary & Mineral Society of Montgomery County, Md. along with the U.S. Geological Survey (USGS) to learn about rocks and minerals in our region, how they are used in everyday objects, flourescent rocks and minerals, and Maryland fossils. This program is free, no reservations are required.