metamorphic
Pyrite-bearing schist
Quartz–mica schist with disseminated pyrite (FeS₂), possibly other iron sulfides
AI-generated identification · may be incorrectGray, foliated and sparkly, with brassy-yellow metallic patches. The host rock’s hardness depends on its minerals; pyrite is Mohs 6–6.5, cubic, and has a metallic luster. A photo cannot confirm the sulfide mineral or exact composition.
Identified More metamorphic →
Explore Pyrite-bearing schist in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Gray, foliated and sparkly, with brassy-yellow metallic patches. The host rock’s hardness depends on its minerals; pyrite is Mohs 6–6.5, cubic, and has a metallic luster. A photo cannot confirm the sulfide mineral or exact composition.
Formation & geological history
Formed when clay-rich sedimentary rock was metamorphosed by heat and pressure, producing aligned mica and quartz; sulfides may have formed during metamorphism or earlier mineralization. The specimen’s age and locality are not identifiable from the image.
Uses & applications
Schist is used decoratively and occasionally as building stone; pyrite-bearing specimens are mainly collected or studied as geological samples.
Geological facts
Brassy metallic grains can resemble gold, but pyrite is harder and commonly forms angular or cubic crystals; the visible patches are too indistinct to identify conclusively.
Field identification & locations
Look for mica sheen and planar foliation in the gray host, with brassy sulfide grains. Schists occur in metamorphic belts worldwide; avoid prolonged skin contact with weathering sulfides and keep the sample dry.
More like this
