Here are some books and websites that really rock!
Books:
James, Ian and Andrew Farmer.
Planet Earth, (Great Britain: Dempsey Parr, 1998).
Symes, R. F. et al., Rocks and Minerals, (New York: Alfred A Knopf Inc., 1988).
Websites:
Visit the Kentucky Geological Survey site at:
http://www.uky.edu/KGS/coal/webrokmn /rocksmin.html
See the Smithsonian Museum's gems and jewels at:
http://www.bsu.edu/teachers/academy/gems /welcome.html
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