Pyrite

Field of view: 10 mm. Filmy pyrite. The yellow films with a metallic luster are pyrite. The brown basement underlying pyrite is fine aggregate of caryopilite and quartz. The white part at the left end is quartz. The dark brown part at the bottom is aggregate of fine hematite crystals.

Recovered from a chert-hosted bedded manganese deposit subjected to Pumpellyite-Actinolite facies metamorphism.

Pyrite from this location was described in 1981.