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Brooklyn College - Earth and Environmental Sciences - Minerals
EESC 1101 - Lab 4 - Brooklyn College Building Stone PDF, PDF, Rock (Geology)
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Tremolite: Mineral information, data and localities.
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Earth and Life Science, PDF, Minerals
9 Crystal system ideas crystal system, mineralogy, geology
Brooklyn College - Earth and Environmental Sciences - Minerals - Cleavage and Fracture
Cleavage and fracture « KaiserScience