Minerals in Your House

http://www.oum.ox.ac.uk/thezone/minerals/usage/build.htm

http://www.oum.ox.ac.uk/thezone/minerals/define/quiz/index.htm#question5

http://www.mineralogy4kids.org/minerals-your-house

 

http://alandalusalnatural.blogspot.com.es/2015/04/web-tasks-minerals-and-rocks.html