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The World of Nature

Arthropods and Gastropods | Biodiversity and Endangered Species | Birds | Ecological Specialties | Fungi and Lichens  | Geological Formations, Flows, and History  | Mammals | Microbes | Nature’s Fury | Plants | Reptiles and Amphibians | Rocks and Gemstones | Seasonal Features | Skyscapes | Special Topics | Underwater Treasures | Water | Weather-Related Phenomena


Click on a title below to access the article. (The World & I issue that the article appeared in is found in parentheses.)

Rocks and Gemstones

Rocks and Gemstones
The History of Gold   (Feb 2011) 
Marble: The Elegant Stone   (Apr 2000) 
A Common Mineral Flaunts Its Colors   (Dec 1999) [quartz]
A Treasure in Green   (Dec 1998) [emeralds]
Lavas and Life   (Jul 1998) 
'Nature's Perfect Imperfections'   (Dec 1997) [rubies and sapphires]
Jewels From Fire   (Dec 1996) [diamonds]
Fulgurites   (Jul 1987) 
Cerussite   (May 1987) 
Coquina Rock   (Jan 1987) 

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