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Rocks under the microscope

Geologists can deduce a lot by examining thin sections of rock under the microscope.


(a) Colorless crystals and beige glassy matrix under plane polarized light; (b) Vivid green and blue crystals and black glass matrix under cross-polarizing filters. Images courtesy of M. Perfit. (a) Colorless crystals and glassy matrix under plane polarized light; (b) Emerald green crystal shot with black lines, under cross-polarizing filters. Images courtesy of M. Perfit. Royal blue, grey and brown interlocking crystals, photographed under cross-polarizing filters. Image courtesy of M. Perfit (a) Colorless crystals under plane polarized light; (b) Turquoise crystals and black glass matrix under cross-polarizing filters. Images courtesy of M. Perfit. (a) Colorless crystals and glassy matrix under plane polarized light; (b) Multicolored crystals and black glass matrix under cross-polarizing filters. Images courtesy of M. Perfit. Pink and vivid blue interlocking crystals, photographed under cross-polarizing filters. Image courtesy of M. Perfit
(a) Colorless crystals and beige glassy matrix under plane polarized light; (b) Vivid green and blue crystals and black glass matrix under cross-polarizing filters. Images courtesy of M. Perfit.