Rock Identifier

Category

Metamorphic Mineral

Browse metamorphic mineral specimens identified by the Rock Identifier community.

Learn about Metamorphic Mineral in the encyclopedia

Metagabbro

Metabasalt

Glauconite

Eulysite

Hutcheonite

Halite

Anthracite

Eltyubyuite

Metaquartzite

Slate

Sperrylite

Paracelsian

Green Aventurine (Silicon Dioxide (SiO2) with Fuchsite inclusions) — metamorphic

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Foliated metamorphic rock, likely schist or gneiss (Quartz–mica schist/gneiss; exact identification requires close examination of mineral grains) — metamorphic

Foliated metamorphic rock, likely schist or gneiss

Quartz–mica schist/gneiss; exact identification requires close examination of mineral grains

Likely amphibolite (Amphibolite, composed chiefly of hornblende (amphibole) and plagioclase feldspar) — metamorphic

Likely amphibolite

Amphibolite, composed chiefly of hornblende (amphibole) and plagioclase feldspar

Polished garnet-bearing metamorphic rock (likely garnet schist) (Garnet schist; commonly garnet (often almandine, Fe₃Al₂(SiO₄)₃) in mica-rich rock) — metamorphic

Polished garnet-bearing metamorphic rock (likely garnet schist)

Garnet schist; commonly garnet (often almandine, Fe₃Al₂(SiO₄)₃) in mica-rich rock

Quartz Mineral (Silicon Dioxide (SiO2)) — mineral

Quartz Mineral

Silicon Dioxide (SiO2)

Green garnet (likely tsavorite or demantoid), small polished cabochon (Garnet-group silicate; tsavorite is grossular, Ca₃Al₂(SiO₄)₃, while demantoid is andradite, Ca₃Fe₂(SiO₄)₃) — gemstone

Green garnet (likely tsavorite or demantoid), small polished cabochon

Garnet-group silicate; tsavorite is grossular, Ca₃Al₂(SiO₄)₃, while demantoid is andradite, Ca₃Fe₂(SiO₄)₃

Gneiss (Foliated Metamorphic Rock) — metamorphic

Gneiss

Foliated Metamorphic Rock

Rhodonite (Manganese Inosilicate (Mn,Fe,Mg,Ca)SiO3) — mineral

Rhodonite

Manganese Inosilicate (Mn,Fe,Mg,Ca)SiO3

Greenstone (likely chlorite-rich metamorphic rock) (Chlorite-rich greenschist; commonly composed of chlorite, actinolite, and epidote) — metamorphic

Greenstone (likely chlorite-rich metamorphic rock)

Chlorite-rich greenschist; commonly composed of chlorite, actinolite, and epidote

Talc (Talc (Hydrated magnesium silicate, Mg3Si4O10(OH)2)) — metamorphic

Talc

Talc (Hydrated magnesium silicate, Mg3Si4O10(OH)2)

Mica Schist or Muscovite (KAl2(AlSi3O10)(OH)2) — metamorphic

Mica Schist or Muscovite

KAl2(AlSi3O10)(OH)2

Muscovite Mica (KAl2(AlSi3O10)(OH)2) — mineral

Muscovite Mica

KAl2(AlSi3O10)(OH)2

Muscovite Mica (KAl2(AlSi3O10)(OH)2) — mineral

Muscovite Mica

KAl2(AlSi3O10)(OH)2

Green Aventurine (Silicon Dioxide (SiO2) with Fuchsite inclusions) — metamorphic

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Mica-rich schist (likely biotite schist) (Mica schist, composed mainly of biotite and/or muscovite with quartz and feldspar) — metamorphic

Mica-rich schist (likely biotite schist)

Mica schist, composed mainly of biotite and/or muscovite with quartz and feldspar

Likely amphibolite (Amphibolite, composed mainly of hornblende (amphibole) and plagioclase feldspar) — metamorphic

Likely amphibolite

Amphibolite, composed mainly of hornblende (amphibole) and plagioclase feldspar

Marble (Metamorphic Limestone (CaCO3)) — metamorphic

Marble

Metamorphic Limestone (CaCO3)

Mica (Muscovite or Biotite) (Sheet silicate mineral group (e.g., KAl2(AlSi3O10)(F,OH)2)) — mineral

Mica (Muscovite or Biotite)

Sheet silicate mineral group (e.g., KAl2(AlSi3O10)(F,OH)2)

Vesuvianite (Idocrase) (Ca19(Al, Mg, Fe)13(SiO4)10(Si2O7)4(OH, F, O)10) — mineral

Vesuvianite (Idocrase)

Ca19(Al, Mg, Fe)13(SiO4)10(Si2O7)4(OH, F, O)10

Slate (Foliated Metamorphic Rock) — metamorphic

Slate

Foliated Metamorphic Rock

Green Aventurine (Aventurine Quartz (SiO2 with fuchsite inclusions)) — Mineral

Green Aventurine

Aventurine Quartz (SiO2 with fuchsite inclusions)

Small dark metallic-looking mineral grain, possibly magnetite (Magnetite (Fe₃O₄), tentative identification) — mineral

Small dark metallic-looking mineral grain, possibly magnetite

Magnetite (Fe₃O₄), tentative identification

Magnetite (Magnetite (Fe3O4)) — mineral

Magnetite

Magnetite (Fe3O4)

Small quartz-rich pebble or rock fragment (Quartz (silicon dioxide, SiO₂), possibly with iron-oxide staining or host-rock inclusions) — mineral

Small quartz-rich pebble or rock fragment

Quartz (silicon dioxide, SiO₂), possibly with iron-oxide staining or host-rock inclusions

Epidotite (Unakite-related Epidote) (Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))) — metamorphic

Epidotite (Unakite-related Epidote)

Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))

Banded Gneiss (Gneiss (Metamorphic Rock)) — metamorphic

Banded Gneiss

Gneiss (Metamorphic Rock)

Drill Core Samples (Varied Lithology) (Multi-lithological core samples (containing potential granite, marble, and phyllite/schist sequence)) — igneous, sedimentary, and metamorphic

Drill Core Samples (Varied Lithology)

Multi-lithological core samples (containing potential granite, marble, and phyllite/schist sequence)

igneous, sedimentary, and metamorphic

Weathered gneiss (probable) (Banded quartz–feldspar–mica gneiss) — metamorphic

Weathered gneiss (probable)

Banded quartz–feldspar–mica gneiss

Faceted red garnet (Garnet group, likely almandine (Fe₃Al₂(SiO₄)₃)) — gemstone

Faceted red garnet

Garnet group, likely almandine (Fe₃Al₂(SiO₄)₃)

Blue Apatite (Fluorapatite (Ca5(PO4)3F)) — mineral

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Mixed Mineral Assortment (Pyrite, Kyanite, Agate, Jasper) (FeS2 (Pyrite), Al2SiO5 (Kyanite), SiO2 (Agate/Jasper)) — mineral

Mixed Mineral Assortment (Pyrite, Kyanite, Agate, Jasper)

FeS2 (Pyrite), Al2SiO5 (Kyanite), SiO2 (Agate/Jasper)

Likely dark green-gray metamorphic pebble (Indeterminate; possibly chlorite schist, serpentinite, or amphibolite) — metamorphic

Likely dark green-gray metamorphic pebble

Indeterminate; possibly chlorite schist, serpentinite, or amphibolite

Blue Apatite (Fluorapatite (Ca5(PO4)3F)) — mineral

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Pyrite in Quartz Matrix (Iron Sulfide (FeS2) embedded in Silicon Dioxide (SiO2)) — mineral

Pyrite in Quartz Matrix

Iron Sulfide (FeS2) embedded in Silicon Dioxide (SiO2)

Banded gneiss (Foliated gneiss, likely quartz–feldspar–biotite or amphibole gneiss) — metamorphic

Banded gneiss

Foliated gneiss, likely quartz–feldspar–biotite or amphibole gneiss

Biotite Mica Schist (Metamorphic Rock containing Biotite K(Mg,Fe)3AlSi3O10(OH)2) — metamorphic

Biotite Mica Schist

Metamorphic Rock containing Biotite K(Mg,Fe)3AlSi3O10(OH)2

Almandine Garnet (Almandine (Fe3Al2Si3O12)) — mineral

Almandine Garnet

Almandine (Fe3Al2Si3O12)

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

Banded Gneiss

Gneiss (Foliated Metamorphic Rock)

Rhodonite (Inosilicate, (Mn,Fe,Mg,Ca)SiO3) — mineral

Rhodonite

Inosilicate, (Mn,Fe,Mg,Ca)SiO3

Epidote (Epidote (Ca2(Al, Fe)3(SiO4)3(OH))) — metamorphic

Epidote

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

Likely garnet (rough crystal) (Garnet group, likely almandine (Fe₃Al₂(SiO₄)₃); identification from the image is uncertain) — mineral

Likely garnet (rough crystal)

Garnet group, likely almandine (Fe₃Al₂(SiO₄)₃); identification from the image is uncertain

Red Calcite (Calcium Carbonate (CaCO3)) — mineral

Red Calcite

Calcium Carbonate (CaCO3)