Pyrite
Iron Sulfide (FeS2)
mineral
Category
Metamorphic Or Sedimentary
Browse metamorphic or sedimentary specimens identified by the Rock Identifier community.
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Limonite after Pyrite (Prophecy Stone or Ironstone Concretion)
Goethite/Limonite pseudomorph after Pyrite/Marcasite (FeO(OH)·nH2O)
mineral
Magnetite (Lodestone variety)
Magnetite (Iron(II,III) oxide, Fe3O4)
mineral
Pyrite on Quartz
Iron Sulfide (FeS2) on Silicon Dioxide (SiO2)
mineral
Goethite pseudomorph after Pyrite
Goethite (FeO(OH)) pseudomorph after Pyrite (FeS2)
mineral
Pyrite (Fools Gold)
Iron Sulfide (FeS2)
mineral
Pyrite in Matrix (Quartz/Schist)
Iron Sulfide (FeS2)
mineral
Feldspathic Gneiss
Feldspathic Gneiss (High-grade regional metamorphic rock)
metamorphic
Banded River Rock / Gneiss (highly weathered)
Gneiss
Metamorphic rock
Calcite
Calcite (CaCO3)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Gneiss (specifically a Granitic Gneiss)
Gneiss (typically composed of Quartz, Feldspar, and Mica/Amphiboles)
metamorphic
Gneiss Pebble
Gneiss
metamorphic
Biotite Schist (likely)
Biotite Schist (rock), Biotite (mineral)
Metamorphic
Greenstone / Metagraywacke
Metamorphosed basaltic or sedimentary rock (Complex Silicate)
metamorphic
Petrified Wood
Silicified Wood (SiO2)
metamorphic
Petrified Wood
Silicified Wood (SiO2)
metamorphic
Petrified Wood
Silicified Wood (SiO2)
metamorphic
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Gneiss (specifically Biotite Gneiss)
Gneiss (high-grade metamorphic rock primarily composed of Silicates)
metamorphic
Petrified Wood
Silicified Wood (SiO2)
metamorphic
Almandine Garnet (weathered)
Almandine (Fe3Al2(SiO4)3)
mineral
Gneiss
Gneiss
metamorphic
Zebra Marble
Metamorphosed Alabaster/Limestone (CaCO3)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Gneiss (specifically a Banded Gneiss cobble)
Gneiss (composed mainly of Quartz, Feldspar, and Biotite/Amphibole)
metamorphic
Biotite (Mica)
Biotite group (K(Mg,Fe)3AlSi3O10(F,OH)2)
mineral
Petrified Wood
Silicified Wood (primarily Quartz / Chalcedony: SiO2)
metamorphic
Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Tiger Iron
Tiger Iron (Composition: SiO2, Fe2O3, Fe3O4)
metamorphic
Banded Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Pyrite in Quartz
Iron Sulfide (FeS2) in Silicon Dioxide (SiO2)
Mineral
Quartzite
Quartzite (primarily SiO₂)
metamorphic
Quartzite River Rock
Quartzite (SiO2)
metamorphic
Petrified Wood
Silicified wood (Quartz, SiO2)
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Garnet
Garnet group: X3Y2(SiO4)3 (commonly Almandine-Pyrope series)
mineral
Red Jasper (Banded Jasper)
Silicon Dioxide (SiO2) with Hematite impurities
sedimentary
Gneiss (specifically a Banded Gneiss pebble)
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
White Marble
Recrystallized Calcite (CaCO3)
metamorphic
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral