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Unaxial minerals - procedures for determining optical propertiesProperties to determine: - anisotropic vs isotropic - uniaxial vs biaxial - optic sign - birefringence - colour +- pleochroic formula - absorption scheme
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Optical Mineralogy pleochroism orthopyroxene 1Orthopyroxene in plane-polarized light, showing distinctive pink-green pleochroism. Sample from the Adirondacks, NY
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