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Kyanite in PPL Kyanite thin section

Kyanite

Typically blue in hand sample with bladed crystals.

In thin section: colorless, commonly twinned, high-relief, cleavages prominent.

Below are photomicrographs (plane light and crossed polars) and other images of kyanite. Click on an image to see a larger version. The fields of view are 2-4 mm in each photomicrograph.

Thin section, plane light; Kyanite in Raft River quartzite, Utah (sample from R. Gottardi & C. Teyssier)

Thin section, crossed polars; Kyanite in Raft River quartzite, Utah (sample from R. Gottardi & C. Teyssier)

Thin section, crossed polars: Kyanite in muscovite schist from the Solitude [Continue reading…]

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