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Biotite thin section - Phyllosilicates - MicROCKScopic
Minerals | Virtual Microscope
Biotite thin section under microscope | Pleochroic - YouTube
Biotite - Clark Science Center
Biotite Mica : Properties, Formation, Ocurrence and Uses
5.4.2: Plane (PP) Polarized Light and Cross Polarized (XP)Light
Biotite in thin section - YouTube
An introduction to minerals and rocks under the microscope
Biotite - ALEX STREKEISEN
Garnet-biotite augen gneiss - Virtual Microscope