https://www.cms4schools.com/news_rss.cfm?detailid=689001&memberid=963 Lake Mills Area School District - 3rd Grade Library Links en-us http://skywalker.cochise.edu/wellerr/mineral/minlist.htm http://www.mnh.si.edu/earth/main_frames.html?7_0_0 http://www.childrensmuseum.org/geomysteries/index2.html http://www.minerals.net/mineralimagegallery.aspx http://www.edu.pe.ca/southernkings/rockcycle.htm http://www.rocksforkids.com/RFK/identification.html