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

Marble (Recrystallized Calcite (CaCO3)) — metamorphic

Marble

Recrystallized Calcite (CaCO3)

Foliated gneiss, possibly migmatitic gneiss (Gneiss; primarily quartz, feldspar, and mica (biotite/muscovite), with possible amphibole) — metamorphic

Foliated gneiss, possibly migmatitic gneiss

Gneiss; primarily quartz, feldspar, and mica (biotite/muscovite), with possible amphibole

Banded gneiss (Foliated quartz–feldspar gneiss, likely granitic gneiss) — metamorphic

Banded gneiss

Foliated quartz–feldspar gneiss, likely granitic gneiss

Banded gneiss pebble (Gneiss, a foliated metamorphic rock; exact mineral composition cannot be determined from the image) — metamorphic

Banded gneiss pebble

Gneiss, a foliated metamorphic rock; exact mineral composition cannot be determined from the image

Banded gneiss (Quartz–feldspar gneiss, with dark biotite or amphibole) — metamorphic

Banded gneiss

Quartz–feldspar gneiss, with dark biotite or amphibole

Tumbled or weathered gneiss (Feldspar–quartz–mica gneiss (composition variable)) — metamorphic

Tumbled or weathered gneiss

Feldspar–quartz–mica gneiss (composition variable)

Galena (Lead Sulfide (PbS)) — mineral

Galena

Lead Sulfide (PbS)

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

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(F,OH)2)

Greenschist (Greenschist (Chlorite-actinolite schist)) — metamorphic

Greenschist

Greenschist (Chlorite-actinolite schist)

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

Unidentified small mineral fragments (Likely quartz- or feldspar-rich material; species cannot be determined reliably from the image) — mineral

Unidentified small mineral fragments

Likely quartz- or feldspar-rich material; species cannot be determined reliably from the image

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Likely banded metamorphic rock, possibly schist or gneiss (Micaceous schist/gneiss; identification is limited from the photograph) — metamorphic

Likely banded metamorphic rock, possibly schist or gneiss

Micaceous schist/gneiss; identification is limited from the photograph

Quartz River Pebble (Quartzite) (Metamorphic Quartzite (SiO2)) — metamorphic

Quartz River Pebble (Quartzite)

Metamorphic Quartzite (SiO2)

Jasper (SiO2) — Mineral

Jasper

SiO2

Quartz pebble (SiO2, Quartz) — mineral

Quartz pebble

SiO2, Quartz

Moonstone (Orthoclase (KAlSi3O8)) — mineral

Moonstone

Orthoclase (KAlSi3O8)

Kyanite (Kyanite (Al2SiO5)) — mineral

Kyanite

Kyanite (Al2SiO5)

Magnetite-rich iron ore (Magnetite (Fe₃O₄), possibly massive magnetite/ironstone) — mineral

Magnetite-rich iron ore

Magnetite (Fe₃O₄), possibly massive magnetite/ironstone

Dark metamorphic rock, likely schist or gneiss (Mica schist/gneiss; commonly quartz + feldspar + biotite, with possible amphibole) — metamorphic

Dark metamorphic rock, likely schist or gneiss

Mica schist/gneiss; commonly quartz + feldspar + biotite, with possible amphibole

Foliated metamorphic rock, likely mica schist (Mica schist, mainly quartz–feldspar–mica assemblage) — metamorphic

Foliated metamorphic rock, likely mica schist

Mica schist, mainly quartz–feldspar–mica assemblage

Polished ruby-in-fuchsite (tentative) (Fuchsite mica with corundum (ruby), commonly in quartzite or mica schist) — metamorphic

Polished ruby-in-fuchsite (tentative)

Fuchsite mica with corundum (ruby), commonly in quartzite or mica schist

Greenstone (Metamorphic Greenstone (Greenschist facies)) — metamorphic

Greenstone

Metamorphic Greenstone (Greenschist facies)

Likely chlorite schist (Chlorite-rich schist; chiefly chlorite with possible quartz and mica) — metamorphic

Likely chlorite schist

Chlorite-rich schist; chiefly chlorite with possible quartz and mica

Orthoclase Feldspar (KAlSi3O8 (Potassium Aluminum Silicate)) — mineral

Orthoclase Feldspar

KAlSi3O8 (Potassium Aluminum Silicate)

Gneiss (Foliated Metamorphic Rock) — metamorphic

Gneiss

Foliated Metamorphic Rock

Likely mica schist (Mica-rich schist, likely muscovite–biotite schist; exact identification requires examination) — metamorphic

Likely mica schist

Mica-rich schist, likely muscovite–biotite schist; exact identification requires examination

Hypersthene (Hypersthene ((Mg,Fe)SiO₃)) — Mineral

Hypersthene

Hypersthene ((Mg,Fe)SiO₃)

Talc Schist / Soapstone (Talc (Mg3Si4O10(OH)2)) — metamorphic

Talc Schist / Soapstone

Talc (Mg3Si4O10(OH)2)

Quartz-rich rock fragment, possibly milky quartz (Quartz (SiO₂), likely a small vein-quartz or quartz-bearing rock fragment) — mineral

Quartz-rich rock fragment, possibly milky quartz

Quartz (SiO₂), likely a small vein-quartz or quartz-bearing rock fragment

Pyrite with Quartz (Iron Sulfide (FeS2) with Silicon Dioxide (SiO2)) — mineral

Pyrite with Quartz

Iron Sulfide (FeS2) with Silicon Dioxide (SiO2)

Tiger’s eye (Quartz (SiO₂), fibrous pseudomorph after crocidolite) — gemstone

Tiger’s eye

Quartz (SiO₂), fibrous pseudomorph after crocidolite

Likely biotite-rich schist (Mica schist, likely biotite-rich; exact minerals cannot be confirmed from the photo) — metamorphic

Likely biotite-rich schist

Mica schist, likely biotite-rich; exact minerals cannot be confirmed from the photo

Mica-rich Schist fragment (Mica Schist) — metamorphic

Mica-rich Schist fragment

Mica Schist

Milky Quartz with Iron Staining (Silicon Dioxide (SiO2) with Hematite/Limonite) — mineral

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2) with Hematite/Limonite

Likely garnet-bearing rock (possibly almandine garnet in matrix) (Garnet, likely almandine (Fe₃Al₂Si₃O₁₂); host rock cannot be determined from the image) — metamorphic

Likely garnet-bearing rock (possibly almandine garnet in matrix)

Garnet, likely almandine (Fe₃Al₂Si₃O₁₂); host rock cannot be determined from the image

Magnetite (Iron Ore) (Iron(II,III) oxide (Fe3O4)) — mineral

Magnetite (Iron Ore)

Iron(II,III) oxide (Fe3O4)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Tumbled rhodonite (Rhodonite, manganese inosilicate (MnSiO₃)) — mineral

Tumbled rhodonite

Rhodonite, manganese inosilicate (MnSiO₃)

Tumbled green aventurine (Quartz (SiO₂), commonly containing fuchsite mica inclusions) — mineral

Tumbled green aventurine

Quartz (SiO₂), commonly containing fuchsite mica inclusions

Green Aventurine (Aventurine Quartz (SiO2 + Fuchsite inclusions)) — mineral

Green Aventurine

Aventurine Quartz (SiO2 + Fuchsite inclusions)

Graphite (Graphite (Carbon, C)) — mineral

Graphite

Graphite (Carbon, C)