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

Gneiss (Gneissic Metamorphic Rock) — metamorphic

Gneiss

Gneissic Metamorphic Rock

Gneiss (specifically Granitic Gneiss) (Gneissic Metamorphic Rock) — metamorphic

Gneiss (specifically Granitic Gneiss)

Gneissic Metamorphic Rock

Gneiss (Gneiss (Metamorphic Rock)) — metamorphic

Gneiss

Gneiss (Metamorphic Rock)

Gneiss (with Mica and Quartz) (Gneissic Metamorphic Rock) — metamorphic

Gneiss (with Mica and Quartz)

Gneissic Metamorphic Rock

Gneiss (Gneiss (Metamorphic rock)) — metamorphic

Gneiss

Gneiss (Metamorphic rock)

Gneiss (Gneissic Metamorphic Rock) — metamorphic

Gneiss

Gneissic Metamorphic Rock

Gneiss (with Quartzite layers) (Gneissic Metamorphic Rock) — metamorphic

Gneiss (with Quartzite layers)

Gneissic Metamorphic Rock

Slate (Foliated Metamorphic Rock) — metamorphic

Slate

Foliated Metamorphic Rock

Banded Gneiss (Gneiss (Metamorphic Rock)) — metamorphic

Banded Gneiss

Gneiss (Metamorphic Rock)

Slate (Foliated Metamorphic Rock) — metamorphic

Slate

Foliated Metamorphic Rock

Banded Gneiss (Gneiss (Metamorphic Rock)) — metamorphic

Banded Gneiss

Gneiss (Metamorphic Rock)

Slate (Slate (Metamorphic Rock)) — metamorphic

Slate

Slate (Metamorphic Rock)

Black Slate (Slate (Metamorphic Rock)) — metamorphic

Black Slate

Slate (Metamorphic Rock)

Slate (Slate (Metamorphic Rock)) — metamorphic

Slate

Slate (Metamorphic Rock)

Schist (Metamorphic Rock (Schist)) — metamorphic

Schist

Metamorphic Rock (Schist)

Schist (Metamorphic Rock (Schist)) — metamorphic

Schist

Metamorphic Rock (Schist)

Quartzite (Metamorphic rock (SiO2)) — metamorphic

Quartzite

Metamorphic rock (SiO2)

River Pebble (Gneiss/Schist mix) (Metamorphic rock aggregate) — metamorphic

River Pebble (Gneiss/Schist mix)

Metamorphic rock aggregate

Quartzite (Metamorphic Rock (Quartzite)) — metamorphic

Quartzite

Metamorphic Rock (Quartzite)

Quartzite (Metamorphic rock (SiO2)) — metamorphic

Quartzite

Metamorphic rock (SiO2)

Tiger's Eye (Pseudomorph of Quartz after Crocidolite (SiO2)) — mineral

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Tanzanite (Zoisite (Ca2Al3(SiO4)(Si2O7)O(OH))) — gemstone

Tanzanite

Zoisite (Ca2Al3(SiO4)(Si2O7)O(OH))

Conical fossil shell or shell fragment (Likely a gastropod shell fragment; exact taxon indeterminate from the image) — fossil

Conical fossil shell or shell fragment

Likely a gastropod shell fragment; exact taxon indeterminate from the image

Slate (Foliated Metamorphic Rock (Mainly composed of Quartz, Illite, Chlorite)) — metamorphic

Slate

Foliated Metamorphic Rock (Mainly composed of Quartz, Illite, Chlorite)

Weathered schist or phyllite (Mica-rich pelitic metamorphic rock; commonly quartz–muscovite/biotite schist or phyllite) — metamorphic

Weathered schist or phyllite

Mica-rich pelitic metamorphic rock; commonly quartz–muscovite/biotite schist or phyllite

Tiger's Eye (Rough) (Pseudomorph of Quartz after Crocidolite (SiO2)) — mineral

Tiger's Eye (Rough)

Pseudomorph of Quartz after Crocidolite (SiO2)

Quartzite (Quartzite (SiO2 with minor impurities)) — metamorphic

Quartzite

Quartzite (SiO2 with minor impurities)

Epidote (Unakite component) / Green Quartzite (Ca2(Al,Fe)3(SiO4)3(OH)) — metamorphic

Epidote (Unakite component) / Green Quartzite

Ca2(Al,Fe)3(SiO4)3(OH)

Likely weathered fossil shell or fossiliferous limestone (Indeterminate molluscan fossil, possibly a bivalve or brachiopod preserved in carbonate rock) — fossil

Likely weathered fossil shell or fossiliferous limestone

Indeterminate molluscan fossil, possibly a bivalve or brachiopod preserved in carbonate rock

Quartzite with Iron Inclusions (Quartzite (SiO2 with Fe2O3 impurities)) — metamorphic

Quartzite with Iron Inclusions

Quartzite (SiO2 with Fe2O3 impurities)

Rounded gray metamorphic cobble, likely quartzite or gneiss (Quartz-rich metamorphic rock; possibly quartzite (mostly SiO₂) or banded gneiss) — metamorphic

Rounded gray metamorphic cobble, likely quartzite or gneiss

Quartz-rich metamorphic rock; possibly quartzite (mostly SiO₂) or banded gneiss

Quartz-rich granitic cobble (Granite or granitic gneiss; primarily quartz, feldspar, and mica) — igneous

Quartz-rich granitic cobble

Granite or granitic gneiss; primarily quartz, feldspar, and mica

Rounded sedimentary pebble, likely mudstone or shale (Argillite/mudstone; predominantly compacted clay minerals with quartz and iron oxides) — sedimentary

Rounded sedimentary pebble, likely mudstone or shale

Argillite/mudstone; predominantly compacted clay minerals with quartz and iron oxides

Tumbled dark gray stone, likely basalt (Basalt; fine-grained mafic volcanic rock composed mainly of plagioclase feldspar and pyroxene, commonly with olivine) — igneous

Tumbled dark gray stone, likely basalt

Basalt; fine-grained mafic volcanic rock composed mainly of plagioclase feldspar and pyroxene, commonly with olivine

Unakite (Epidotized Granite) — metamorphic

Unakite

Epidotized Granite

Milky Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Milky Quartz Pebble

Silicon Dioxide (SiO2)

Sandstone pebble (Sandstone (arenite / quartzarenite)) — sedimentary

Sandstone pebble

Sandstone (arenite / quartzarenite)

Banded Slate (Slate (Metamorphosed Siltstone/Mudstone)) — metamorphic

Banded Slate

Slate (Metamorphosed Siltstone/Mudstone)

White marble (likely calcitic marble) (Calcite-rich marble; primarily calcium carbonate, CaCO₃) — metamorphic

White marble (likely calcitic marble)

Calcite-rich marble; primarily calcium carbonate, CaCO₃

Rounded quartz-rich sandstone pebble (Quartz arenite (sandstone), composition mainly SiO₂ with minor feldspar, mica, and iron-oxide cement) — sedimentary

Rounded quartz-rich sandstone pebble

Quartz arenite (sandstone), composition mainly SiO₂ with minor feldspar, mica, and iron-oxide cement

Garnet Schist (Mica Schist with Almandine (Fe3Al2(SiO4)3)) — metamorphic

Garnet Schist

Mica Schist with Almandine (Fe3Al2(SiO4)3)

Migmatite (Migmatite (Mixed Rock)) — metamorphic

Migmatite

Migmatite (Mixed Rock)