Section: Topic 6 | Rock Minerals in Thin Sections

MSWPC-E

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Pleochroism

The property of anisotropic crystals to absorb different wavelengths of light in different directions.
A colour's change is observed when the crystal is rotated in plane polarised light.

Section outline

- Select activity Feldspars, Feldspathoids, Silica minerals (Sanidine, Orthoclase, Microcline, Plagioclase, Perthites, Nepheline, Quartz ß, Chalcedony, Opal )
  
  Feldspars, Feldspathoids, Silica minerals (Sanidine, Orthoclase, Microcline, Plagioclase, Perthites, Nepheline, Quartz ß, Chalcedony, Opal ) Page