Sericite Thin Section

Sillimanite thin section photomicrographs are taken in plane polarized light and cross polarized light and can easily be recognized under the microscope.

Sericite thin section. Home atlas of minerals in thin section. Home atlas of minerals in thin section. Sericite grains are too small to see in hand specimens and it is transparent with only moderate relief when viewed in thin section in plane polarised light.

Sericite is a common alteration mineral of orthoclase or plagioclase feldspars in areas that have been subjected to hydrothermal alteration typically associated with copper tin or other hydrothermal ore deposits. Sericite also occurs as the fine mica that gives the sheen to phyllite and schistose metamorphic rocks. Staurolite garnet schist in thin section under cross polarized light with sericite.