metamorphic
Pyrite-bearing metamorphic rock (probable pyrite schist or sulfide ore)
Pyrite (FeS₂) in a foliated, quartz–mica-rich host rock; exact identification requires testing
AI-generated identification · may be incorrectBrassy metallic luster with granular/crystalline texture and dark host matrix; pyrite hardness 6–6.5, cubic crystal structure, no prominent cleavage, and specific gravity about 5.0. The specimen appears rough and partially weathered, with insufficient detail for confident mineral identification.
Identified More metamorphic →
Explore Pyrite-bearing metamorphic rock (probable pyrite schist or sulfide ore) in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Brassy metallic luster with granular/crystalline texture and dark host matrix; pyrite hardness 6–6.5, cubic crystal structure, no prominent cleavage, and specific gravity about 5.0. The specimen appears rough and partially weathered, with insufficient detail for confident mineral identification.
Formation & geological history
Likely formed when sulfur- and iron-rich fluids or sediments were metamorphosed, commonly during hydrothermal or regional metamorphic processes. The rock’s age cannot be determined from an image.
Uses & applications
Pyrite is mined as a sulfur source and sometimes for associated copper, gold, or other metals; attractive crystals are collected, but this small irregular piece has little commercial value.
Geological facts
Pyrite is called “fool’s gold,” but it is generally harder, more brittle, and less malleable than gold. A streak test producing a greenish-black to brown-black streak helps distinguish it from gold’s yellow streak.
Field identification & locations
Common in hydrothermal veins, coal beds, sedimentary rocks, and metamorphic sulfide deposits worldwide. Confirm with a streak test, hardness test, and ideally specific-gravity or chemical testing; avoid prolonged moisture because pyrite can oxidize.
More like this
