Chondrite L6, SAHARA 98240.

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Polished section of a L6 chondrite with a metallographic microscope with polarizer and analyzer. The polarizer and analyzer are slightly uncrossed so that opaque minerals appear grey instead of black.

Polished section of L6 Chondrite with the analyzer removed. The white mineral is metallic iron, the bright slightly yellow is troilite (iron sulfide) and the light gray can be goethite. The dark gray regions  are the transparent minerals. Compare to LPA picture.