Rock Identifier

Category

Metamorphic Rock

Browse metamorphic rock specimens identified by the Rock Identifier community.

Learn about Metamorphic Rock in the encyclopedia

Calc-Silicate Rock

Calc-Silicate Rock

Eulysite

Metabasalt

Hornfels

Metarhyolite

Metagabbro

Talc-carbonate Rock

Talc-carbonate Rock

Rock Gypsum

Coral Rock

Rock Salt

Asphalt Rock

Amphibolite

Weathered gray metamorphic rock, likely schist or slate (Foliated silicate rock; possibly mica schist or phyllite) — metamorphic

Weathered gray metamorphic rock, likely schist or slate

Foliated silicate rock; possibly mica schist or phyllite

Quartz-rich metamorphic rock, likely quartzite or vein quartz (Quartzite; predominantly microcrystalline quartz (SiO₂), possibly with mica and feldspar) — metamorphic

Quartz-rich metamorphic rock, likely quartzite or vein quartz

Quartzite; predominantly microcrystalline quartz (SiO₂), possibly with mica and feldspar

Tiger Iron (Tiger Iron (Hematite, Red Jasper, and Tiger's Eye)) — metamorphic

Tiger Iron

Tiger Iron (Hematite, Red Jasper, and Tiger's Eye)

Rounded dark metamorphic rock, likely amphibolite (Amphibolite; chiefly hornblende amphibole and plagioclase feldspar) — metamorphic

Rounded dark metamorphic rock, likely amphibolite

Amphibolite; chiefly hornblende amphibole and plagioclase feldspar

Weathered quartz-rich metamorphic rock, likely quartzite (Quartzite, composed predominantly of quartz (SiO₂), possibly with feldspar and mica impurities) — metamorphic

Weathered quartz-rich metamorphic rock, likely quartzite

Quartzite, composed predominantly of quartz (SiO₂), possibly with feldspar and mica impurities

Foliated metamorphic rock (likely slate or phyllite) (Slate/phyllite; chiefly quartz, mica, and chlorite) — metamorphic

Foliated metamorphic rock (likely slate or phyllite)

Slate/phyllite; chiefly quartz, mica, and chlorite

Weathered mafic metamorphic rock, likely amphibolite (Amphibolite; chiefly hornblende amphibole and plagioclase feldspar, with minor biotite, quartz, or garnet) — metamorphic

Weathered mafic metamorphic rock, likely amphibolite

Amphibolite; chiefly hornblende amphibole and plagioclase feldspar, with minor biotite, quartz, or garnet

Tumbled garnet-bearing metamorphic rock (Likely garnet schist or garnet-bearing gneiss; garnet is commonly almandine, Fe₃Al₂(SiO₄)₃) — metamorphic

Tumbled garnet-bearing metamorphic rock

Likely garnet schist or garnet-bearing gneiss; garnet is commonly almandine, Fe₃Al₂(SiO₄)₃

Quartz-rich metamorphic rock, likely quartzite (Quartzite; predominantly crystalline SiO₂, with minor gray mica/graphite or accessory minerals) — metamorphic

Quartz-rich metamorphic rock, likely quartzite

Quartzite; predominantly crystalline SiO₂, with minor gray mica/graphite or accessory minerals

Schist (Mica Schist) — metamorphic

Schist

Mica Schist

Tumbled bronzite-rich metamorphic rock (Likely bronzite-bearing serpentinite or norite; exact identification requires testing) — metamorphic

Tumbled bronzite-rich metamorphic rock

Likely bronzite-bearing serpentinite or norite; exact identification requires testing

Banded metamorphic rock, likely mica schist (Mica schist, probably muscovite–biotite schist with quartz and feldspar) — metamorphic

Banded metamorphic rock, likely mica schist

Mica schist, probably muscovite–biotite schist with quartz and feldspar

Dark gray foliated metamorphic rock, likely slate or phyllite (Slate–phyllite; predominantly quartz, mica, and chlorite) — metamorphic

Dark gray foliated metamorphic rock, likely slate or phyllite

Slate–phyllite; predominantly quartz, mica, and chlorite

Weathered quartz-rich metamorphic rock, likely gneiss or schist (Quartz–feldspar–mica gneiss/schist (tentative; image resolution limits certainty)) — metamorphic

Weathered quartz-rich metamorphic rock, likely gneiss or schist

Quartz–feldspar–mica gneiss/schist (tentative; image resolution limits certainty)

Pyrite-bearing metamorphic rock (likely greenschist or phyllite) (Quartz–chlorite–mica schist/phyllite with disseminated pyrite (FeS₂)) — metamorphic

Pyrite-bearing metamorphic rock (likely greenschist or phyllite)

Quartz–chlorite–mica schist/phyllite with disseminated pyrite (FeS₂)

Quartz-rich metamorphic rock (likely quartzite) (Quartzite, composed predominantly of quartz (SiO₂), with minor iron-oxide and mica impurities) — metamorphic

Quartz-rich metamorphic rock (likely quartzite)

Quartzite, composed predominantly of quartz (SiO₂), with minor iron-oxide and mica impurities

Quartz-rich metamorphic rock (likely mica schist or gneiss) (Quartz–feldspar–mica assemblage; probable biotite schist/gneiss) — metamorphic

Quartz-rich metamorphic rock (likely mica schist or gneiss)

Quartz–feldspar–mica assemblage; probable biotite schist/gneiss

Weathered quartz-rich metamorphic rock (probable quartzite) (Quartzite; predominantly crystalline SiO₂, possibly iron-oxide stained) — metamorphic

Weathered quartz-rich metamorphic rock (probable quartzite)

Quartzite; predominantly crystalline SiO₂, possibly iron-oxide stained

Weathered quartz-rich metamorphic rock, likely quartzite (Quartzite (mostly microcrystalline SiO₂), possibly iron-stained mica-bearing quartzite) — metamorphic

Weathered quartz-rich metamorphic rock, likely quartzite

Quartzite (mostly microcrystalline SiO₂), possibly iron-stained mica-bearing quartzite

Quartz-veined metamorphic rock, likely schist or gneiss (Micaceous quartz-feldspar rock; probable mica schist/gneiss with quartz veins) — metamorphic

Quartz-veined metamorphic rock, likely schist or gneiss

Micaceous quartz-feldspar rock; probable mica schist/gneiss with quartz veins

Likely pyrite-bearing metamorphic rock (Quartz–mica schist or gneiss with disseminated pyrite (FeS₂)) — metamorphic

Likely pyrite-bearing metamorphic rock

Quartz–mica schist or gneiss with disseminated pyrite (FeS₂)

Banded metamorphic rock, likely gneiss (Gneiss; predominantly quartz–feldspar with mica/amphibole minerals) — metamorphic

Banded metamorphic rock, likely gneiss

Gneiss; predominantly quartz–feldspar with mica/amphibole minerals

Likely mica-rich metamorphic rock (schist or gneiss) (Biotite–quartz–feldspar schist/gneiss; exact identification is limited by the blurred image) — metamorphic

Likely mica-rich metamorphic rock (schist or gneiss)

Biotite–quartz–feldspar schist/gneiss; exact identification is limited by the blurred image

Garnet-bearing metamorphic rock, likely garnet gneiss or garnet amphibolite (Garnet-bearing gneiss; red crystals likely almandine garnet, Fe₃Al₂(SiO₄)₃) — metamorphic

Garnet-bearing metamorphic rock, likely garnet gneiss or garnet amphibolite

Garnet-bearing gneiss; red crystals likely almandine garnet, Fe₃Al₂(SiO₄)₃

Mica-rich metamorphic rock, likely schist (Muscovite–biotite schist; principally muscovite mica, biotite, quartz, and feldspar) — metamorphic

Mica-rich metamorphic rock, likely schist

Muscovite–biotite schist; principally muscovite mica, biotite, quartz, and feldspar

Weathered, quartz-rich metamorphic rock (likely schist or gneiss) (Quartz–feldspar–mica schist/gneiss, with surface lichens and iron-oxide staining) — metamorphic

Weathered, quartz-rich metamorphic rock (likely schist or gneiss)

Quartz–feldspar–mica schist/gneiss, with surface lichens and iron-oxide staining

Weathered quartz-rich metamorphic rock (likely gneiss or quartzite) (Quartz (SiO₂) with probable feldspar, mica, and iron-oxide alteration) — metamorphic

Weathered quartz-rich metamorphic rock (likely gneiss or quartzite)

Quartz (SiO₂) with probable feldspar, mica, and iron-oxide alteration

Weathered quartz-rich metamorphic rock (probable quartzite) (Quartzite, primarily microcrystalline quartz (SiO₂), with possible iron-oxide staining and minor mica/feldspar) — metamorphic

Weathered quartz-rich metamorphic rock (probable quartzite)

Quartzite, primarily microcrystalline quartz (SiO₂), with possible iron-oxide staining and minor mica/feldspar

River Pebble (Gneiss or Quartzite mixture) (Metamorphic rock (Commonly Gneissic)) — metamorphic

River Pebble (Gneiss or Quartzite mixture)

Metamorphic rock (Commonly Gneissic)

Slate (Foliated metamorphic rock (Slate)) — metamorphic

Slate

Foliated metamorphic rock (Slate)

Slate (Slate (Foliated Metamorphic Rock)) — metamorphic

Slate

Slate (Foliated Metamorphic Rock)

Slate (Slate (Foliated Metamorphic Rock)) — metamorphic

Slate

Slate (Foliated Metamorphic Rock)

Banded Gneiss (Banded Gneiss (Metamorphic Rock)) — metamorphic

Banded Gneiss

Banded Gneiss (Metamorphic Rock)

Schist (Crystalline Metamorphic Rock (Schist)) — metamorphic

Schist

Crystalline Metamorphic Rock (Schist)

Slate (Slate (Foliated Metamorphic Rock)) — metamorphic

Slate

Slate (Foliated Metamorphic Rock)

Banded Gneiss / Metamorphic River Pebble (Gneiss (Foliated Metamorphic Rock)) — metamorphic

Banded Gneiss / Metamorphic River Pebble

Gneiss (Foliated Metamorphic Rock)

Gneiss (Gneiss (foliated metamorphic rock)) — metamorphic

Gneiss

Gneiss (foliated metamorphic rock)

Slate (Slate (Foliated Metamorphic Rock)) — metamorphic

Slate

Slate (Foliated Metamorphic Rock)

Gneiss (Gneiss (Foliated Metamorphic Rock)) — metamorphic

Gneiss

Gneiss (Foliated Metamorphic Rock)

Schist (Mica Schist (Metamorphic rock)) — metamorphic

Schist

Mica Schist (Metamorphic rock)

Schist (Crystalline Metamorphic Rock (Schistose)) — metamorphic

Schist

Crystalline Metamorphic Rock (Schistose)

Slate (Slate (foliated metamorphic rock)) — metamorphic

Slate

Slate (foliated metamorphic rock)