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Earth and the Environment
Minerals, Mining, and Metallurgy
Mineralogy and Crystallography
Mineralogy and Crystallography
azurite
barite
beryl
biotite
bloodstone
brittle
brown coal
calcite
Cancrinites
cannel coal
capture
carnelian
cassiterite
cats-eye
celestite
cerussite
chalcopyrite
chromite
chrysoberyl
Chrysotile
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Research Categories
Earth and Environment
History
Literature and the Arts
Medicine
People
Philosophy and Religion
Places
Plants and Animals
Science and Technology
Social Sciences and the Law
Sports and Everyday Life
Additional References
Articles
Daily