Rock Identifier

Category

Metamorphic Rock (Composed Of Multiple Minerals)

Browse metamorphic rock (composed of multiple minerals) specimens identified by the Rock Identifier community.

Learn about Metamorphic Rock (Composed Of Multiple Minerals) in the encyclopedia

Rock Salt

Calc-Silicate Rock

Calc-Silicate Rock

Talc-carbonate Rock

Talc-carbonate Rock

Eulysite

Metabasalt

Hornfels

Metagabbro

Albitite

Epidosite

Schist

Metarhyolite

Cordierite Hornfels

Cordierite Hornfels

Pyrite-bearing schist or quartzite (Micaceous quartz-rich metamorphic rock with pyrite (FeS₂)) — metamorphic

Pyrite-bearing schist or quartzite

Micaceous quartz-rich metamorphic rock with pyrite (FeS₂)

Red Scoria (Volcanic Cinder) (Scoria (Extrusive Mafic Igneous Rock)) — igneous

Red Scoria (Volcanic Cinder)

Scoria (Extrusive Mafic Igneous Rock)

Schist (with Iron Oxide) (Mica Schist) — metamorphic

Schist (with Iron Oxide)

Mica Schist

Granite Pebble (Granite) — igneous

Granite Pebble

Granite

Weathered quartzite or quartz-rich sandstone (Quartzite, composed predominantly of quartz (SiO₂); field identification is uncertain from the photograph) — metamorphic

Weathered quartzite or quartz-rich sandstone

Quartzite, composed predominantly of quartz (SiO₂); field identification is uncertain from the photograph

Red Coral (Corallium rubrum) — gemstone

Red Coral

Corallium rubrum

Sandstone (Ferruginous) (Arenite (primarily SiO2 with Fe2O3 staining)) — sedimentary

Sandstone (Ferruginous)

Arenite (primarily SiO2 with Fe2O3 staining)

Quartz-rich metamorphic pebble, likely quartzite (Quartzite, composed predominantly of quartz (SiO₂)) — metamorphic

Quartz-rich metamorphic pebble, likely quartzite

Quartzite, composed predominantly of quartz (SiO₂)

Greenstone (Metabasalt / Greenschist) — metamorphic

Greenstone

Metabasalt / Greenschist

Hematite (Hematite (Fe2O3)) — mineral

Hematite

Hematite (Fe2O3)

Conglomerate (Conglomerate) — sedimentary

Conglomerate

Conglomerate

Greenstone / Greenschist (Greenschist (composed of chlorite, epidote, and actinolite)) — metamorphic

Greenstone / Greenschist

Greenschist (composed of chlorite, epidote, and actinolite)

Ferruginous Sandstone (Gritstone) (Arenite with Iron-Oxide Cement (SiO2 with Fe2O3 and FeO(OH))) — sedimentary

Ferruginous Sandstone (Gritstone)

Arenite with Iron-Oxide Cement (SiO2 with Fe2O3 and FeO(OH))

Polished larvikite tower (likely) (Larvikite, a feldspar-rich monzonitic igneous rock) — igneous

Polished larvikite tower (likely)

Larvikite, a feldspar-rich monzonitic igneous rock

Granite (Felsic intrusive igneous rock) — igneous

Granite

Felsic intrusive igneous rock

Banded Marble (Egg Carving) (Metamorphosed Limestone (predominantly CaCO3)) — metamorphic

Banded Marble (Egg Carving)

Metamorphosed Limestone (predominantly CaCO3)

Quartzite cobble (likely) (Quartzite, composed predominantly of quartz (SiO₂)) — metamorphic

Quartzite cobble (likely)

Quartzite, composed predominantly of quartz (SiO₂)

River Stone (composed of Siltstone/Basalt mixture) (Siltstone or microcrystalline Basalt pebble) — sedimentary

River Stone (composed of Siltstone/Basalt mixture)

Siltstone or microcrystalline Basalt pebble

Banded Quartzite or Gneissic Pebble (Quartzite with mafic inclusions (SiO2) or Banded Gneiss) — metamorphic

Banded Quartzite or Gneissic Pebble

Quartzite with mafic inclusions (SiO2) or Banded Gneiss

Uncertain polished mineral specimen (Indeterminate; possibly quartz or feldspar with iron-oxide staining) — mineral

Uncertain polished mineral specimen

Indeterminate; possibly quartz or feldspar with iron-oxide staining

Tumbled brecciated jasper (likely ocean or mahogany jasper) (Jasper—microcrystalline quartz/chalcedony, SiO₂, with iron-oxide inclusions) — mineral

Tumbled brecciated jasper (likely ocean or mahogany jasper)

Jasper—microcrystalline quartz/chalcedony, SiO₂, with iron-oxide inclusions

Red Sandstone (Arenite (SiO2 with Fe2O3)) — sedimentary

Red Sandstone

Arenite (SiO2 with Fe2O3)

Mica-rich metamorphic rock, likely schist (Muscovite–biotite schist, possibly with quartz and feldspar) — metamorphic

Mica-rich metamorphic rock, likely schist

Muscovite–biotite schist, possibly with quartz and feldspar

Greenschist (Greenschist (composed mainly of chlorite, epidote, actinolite, and albite)) — metamorphic

Greenschist

Greenschist (composed mainly of chlorite, epidote, actinolite, and albite)

Porous volcanic rock, likely scoria (Scoria, a vesicular basaltic to andesitic volcanic rock) — igneous

Porous volcanic rock, likely scoria

Scoria, a vesicular basaltic to andesitic volcanic rock

Shale (Shale (Sedimentary rock composed of mud/clay minerals)) — sedimentary

Shale

Shale (Sedimentary rock composed of mud/clay minerals)

Sandstone (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone

Clastic sedimentary rock (primarily SiO2)

Granodiorite (Phaneritic intrusive igneous rock (intermediate composition)) — igneous

Granodiorite

Phaneritic intrusive igneous rock (intermediate composition)

Sandstone (Arenite (Siliclastic sedimentary rock), SiO2 + various minerals) — sedimentary

Sandstone

Arenite (Siliclastic sedimentary rock), SiO2 + various minerals

Quartz with Mica/Host Rock (Silicon Dioxide (SiO2) with Phyllosilicates) — mineral

Quartz with Mica/Host Rock

Silicon Dioxide (SiO2) with Phyllosilicates

Quartzite (River Pebble) (Meta-quartzite (composed primarily of SiO2)) — metamorphic

Quartzite (River Pebble)

Meta-quartzite (composed primarily of SiO2)

Granite cobble (Granite (composed primarily of Quartz, Feldspar, and Mica)) — igneous

Granite cobble

Granite (composed primarily of Quartz, Feldspar, and Mica)

Granite, likely weathered biotite granite (Phaneritic intrusive igneous rock composed chiefly of quartz, feldspar, and biotite amphibole) — igneous

Granite, likely weathered biotite granite

Phaneritic intrusive igneous rock composed chiefly of quartz, feldspar, and biotite amphibole

Quartz Vein in Metamorphic Rock (Quartz-veined Schist or Gneiss) — metamorphic

Quartz Vein in Metamorphic Rock

Quartz-veined Schist or Gneiss

Gneiss (Feldspathic biotite gneiss; a high-grade metamorphic rock composed mainly of quartz, feldspar, and mica) — metamorphic

Gneiss

Feldspathic biotite gneiss; a high-grade metamorphic rock composed mainly of quartz, feldspar, and mica

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Biotite-bearing gneiss (Mica gneiss, composed mainly of quartz, feldspar, and biotite mica) — metamorphic

Biotite-bearing gneiss

Mica gneiss, composed mainly of quartz, feldspar, and biotite mica

Quartzite (Quartzite (primarily composed of SiO

O₂)) — Sedimentary Rock

Quartzite

Quartzite (primarily composed of SiO O₂)

Sedimentary Rock

Rounded sandstone pebble (Quartz-rich sandstone; commonly arkose or lithic sandstone) — sedimentary

Rounded sandstone pebble

Quartz-rich sandstone; commonly arkose or lithic sandstone

Mixed gravelly conglomeratic road aggregate (Polymictic clast-supported conglomerate or fill; composition varies, commonly quartz, feldspar, basalt, and weathered rock fragments) — sedimentary

Mixed gravelly conglomeratic road aggregate

Polymictic clast-supported conglomerate or fill; composition varies, commonly quartz, feldspar, basalt, and weathered rock fragments

Quartzite (Quartzite (composed primarily of Silica, SiO2)) — metamorphic

Quartzite

Quartzite (composed primarily of Silica, SiO2)

Unakite (Granitic rock composed of orthoclase, epidote, and quartz) — metamorphic

Unakite

Granitic rock composed of orthoclase, epidote, and quartz