https://www.open.edu/openlearn/science-maths-technology/an-introduction-minerals-and-rocks-under-the-microscope/content-section-3.4.1
In this free course, An introduction to minerals and rocks under the microscope, you will experience the study of minerals using a polarising microscope. While...
introductionmineralsrocksmicroscope
https://www.usgs.gov/data/oxide-and-cation-compositions-pyroxene-grains-drill-core-duluth-complex-minnesota
The table contains oxide and cation compositions of pyroxene grains from drill core in the Duluth Complex. The oxides were determined by electron probe...
drill coreoxidecationcompositionspyroxene