Pyrite
Iron Disulfide (FeS2)
mineral
Category
Metamorphic Or Sedimentary
Browse metamorphic or sedimentary specimens identified by the Rock Identifier community.
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Specular Hematite (Specularite)
Iron Oxide (Fe2O3)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Quartzite River Cobble
Quartzite (dominated by SiO2)
metamorphic
Gneiss (with Quartz and Mica)
Gneiss
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Anthracite
Anthracite coal
metamorphic
Copper-bearing Mica Schist
Mica Schist with Native Copper inclusions
metamorphic
Ferruginous Quartzite (Chert)
Quartzite with Iron inclusions (SiO2 + Fe2O3)
metamorphic
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Clear Quartz (or Rock Crystal)
Quartz (SiO₂)
Mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Hematite (Iron Ore)
Hematite (Fe2O3)
mineral
Calcite in Matrix
Calcium Carbonate (CaCO3)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
Mineral
Feldspar
Potassium Feldspar (KAlSi3O8)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Quartzite (River Cobble)
Quartzite (primarily SiO2)
metamorphic
Schist
Mica Schist (Variable chemistry, often rich in muscovite and biotite)
metamorphic
Granite Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Anthracite Coal
Anthracite (Carbon-rich metamorphic coal)
metamorphic
Banded Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Quartzite with Iron Inclusions
Metamorphosed Quartz Arenite (SiO2)
metamorphic
Gneiss
Gneiss
metamorphic
Pink Marble (Quartzite or Calcite mix)
Metamorphosed Limestone / Quartzite (CaCO3 or SiO2 with iron impurities)
metamorphic
Gneiss
Gneiss
metamorphic
Banded Gneiss (with Quartz Vein)
Gneiss (SiO2 and varied Silicates)
metamorphic
Green Aventurine
Silicon Dioxide (Quartz) with inclusions of Fuchsite mica (K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Gneiss
Gneiss
metamorphic
Gneiss (specifically Granitic Gneiss)
Gneiss
metamorphic
Marble
Recrystallized Calcite (CaCO3)
metamorphic
Granite Gneiss River Rock
Gneiss
Metamorphic
Granitic Gneiss
Felsic Polycrystalline Gneiss
metamorphic
Gneiss
Gneiss
metamorphic
Gneiss (Banded Gneiss)
Gneiss
metamorphic
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite mica
metamorphic
Granite Gneiss
High-grade regional metamorphic rock (Quartz-Feldspar Gneiss)
metamorphic
Dragon Blood Jasper
Epidote with Red Jasper (Quartz-rich aggregate)
sedimentary
Anthracite Coal
Anthracite
sedimentary