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Glaucophane tutorial Optical mineralogy
Автор: Matt Kohn
Загружено: 2021-05-03
Просмотров: 2767
Описание:
Several videos of glaucophane in thin section, showing typical textures and optical characteristics. Supported by Boise State University and the US National Science Foundation.
Key characteristics: moderate relief, amphibole (60°-120°) cleavage, blue-lavender pleochroism, low interference colors.
00:00 End section
00:30 End section, chemically zoned
01:00 Elongate, blue and lavender pleochroism
01:31 Elongate, intense first order colors
02:01 Fine-grained
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