Orthopyroxene tutorial Optical mineralogy

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Several videos of orthopyroxene in thin section, showing typical textures and optical characteristics. Supported by Boise State University and the US National Science Foundation. • Key characteristics: high relief, moderately good cleavage, pink-green pleochroism, low interference colors, parallel extinction • 00:00 This is about as good as the pink-green pleochroism gets • 00:30 Parallel extinction • 01:01 Range of orientations and interference colors • 01:31 In a gabbro

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