1. Rockhounds (Learn about rocks and how they are formed).

2. Franklin Institute

3. www.ivyhall.district96.k12.il.us/4th/kkhp/RocksandMinerals/rocks.html

4. www.geolab.unc.edu/Petunia/IgMetAtlas/mainmenu.html

5. www.kidskonnect.com/RocksMinerals/RocksMineralsHome.html