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

Chalcopyrite (Peacock Ore) (Chalcopyrite (CuFeS2)) — mineral

Chalcopyrite (Peacock Ore)

Chalcopyrite (CuFeS2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Vein in Matrix (Gneiss/Schist) (Silicon Dioxide (SiO2) in Metamorphic Rock Matrix) — metamorphic

Quartz Vein in Matrix (Gneiss/Schist)

Silicon Dioxide (SiO2) in Metamorphic Rock Matrix

Gneiss with Quartz Veining (Gneiss (High-grade Metamorphic Rock)) — metamorphic

Gneiss with Quartz Veining

Gneiss (High-grade Metamorphic Rock)

Muscovite Mica (Muscovite (Potassium Aluminum Silicate) - KAl2(AlSi3O10)(F,OH)2) — mineral

Muscovite Mica

Muscovite (Potassium Aluminum Silicate) - KAl2(AlSi3O10)(F,OH)2

Weathered schist (likely mica schist) (Mica schist; composition likely quartz, mica (muscovite/biotite), and feldspar) — metamorphic

Weathered schist (likely mica schist)

Mica schist; composition likely quartz, mica (muscovite/biotite), and feldspar

Clear quartz (rock crystal) (Quartz, silicon dioxide (SiO₂)) — mineral

Clear quartz (rock crystal)

Quartz, silicon dioxide (SiO₂)

Pyrite (Iron sulfide (FeS2)) — mineral

Pyrite

Iron sulfide (FeS2)

Biotite (Black Mica) (Biotite - K(Mg,Fe)3(AlSi3O10)(F,OH)2) — mineral

Biotite (Black Mica)

Biotite - K(Mg,Fe)3(AlSi3O10)(F,OH)2

Blue Quartz (Blue Aventurine) (Silicon Dioxide with inclusions (SiO2)) — mineral

Blue Quartz (Blue Aventurine)

Silicon Dioxide with inclusions (SiO2)

Tumbled Moonstone (Feldspar (Orthoclase/Albite), KAlSi3O8) — mineral

Tumbled Moonstone

Feldspar (Orthoclase/Albite), KAlSi3O8

Chalcopyrite (Copper Iron Sulfide (CuFeS2)) — mineral

Chalcopyrite

Copper Iron Sulfide (CuFeS2)

Magnetic Sand Grain / Magnetite Pellet (Magnetite (Fe3O4)) — mineral

Magnetic Sand Grain / Magnetite Pellet

Magnetite (Fe3O4)

Gneiss (Metamorphic Gneiss (High-grade regional metamorphism)) — metamorphic

Gneiss

Metamorphic Gneiss (High-grade regional metamorphism)

Metamorphic rock with large feldspar crystals (likely porphyroblastic gneiss) (Feldspar-porphyroblastic gneiss; likely quartz and feldspar with mica/amphibole, identification from image only) — metamorphic

Metamorphic rock with large feldspar crystals (likely porphyroblastic gneiss)

Feldspar-porphyroblastic gneiss; likely quartz and feldspar with mica/amphibole, identification from image only

Weathered banded gneiss (Foliated quartz–feldspar-rich gneiss; exact mineral identification requires closer examination) — metamorphic

Weathered banded gneiss

Foliated quartz–feldspar-rich gneiss; exact mineral identification requires closer examination

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

Banded gneiss

Foliated gneiss, likely quartz–feldspar–mica gneiss

Banded gneiss (Quartz–feldspar gneiss, possibly biotite-bearing; exact identification requires testing) — metamorphic

Banded gneiss

Quartz–feldspar gneiss, possibly biotite-bearing; exact identification requires testing

Greenschist (Chlorite-actinolite schist) — metamorphic

Greenschist

Chlorite-actinolite schist

Fossilized marine shell fragment (Likely a bivalve or gastropod shell preserved as calcite (CaCO₃)) — fossil

Fossilized marine shell fragment

Likely a bivalve or gastropod shell preserved as calcite (CaCO₃)

Quartz vein fragment (Quartz, silicon dioxide (SiO₂), likely milky to translucent quartz with iron-oxide or clay inclusions) — mineral

Quartz vein fragment

Quartz, silicon dioxide (SiO₂), likely milky to translucent quartz with iron-oxide or clay inclusions

Likely quartz-rich stone (possibly milky quartz or quartzite) (Quartz, silicon dioxide (SiO₂), or quartzite if interlocking grains are present) — mineral

Likely quartz-rich stone (possibly milky quartz or quartzite)

Quartz, silicon dioxide (SiO₂), or quartzite if interlocking grains are present

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

Magnetite

Fe3O4 (Iron(II,III) oxide)

Greenschist (Greenschist facies metamorphic rock; commonly chlorite–actinolite–epidote schist) — metamorphic

Greenschist

Greenschist facies metamorphic rock; commonly chlorite–actinolite–epidote schist

Gneissic Schist (Gneiss-schist (Metamorphic rock)) — metamorphic

Gneissic Schist

Gneiss-schist (Metamorphic rock)

Peacock Ore (Bornite or Iridescent Chalcopyrite) (Bornite (Cu5FeS4) or Acid-treated Chalcopyrite (CuFeS2)) — mineral

Peacock Ore (Bornite or Iridescent Chalcopyrite)

Bornite (Cu5FeS4) or Acid-treated Chalcopyrite (CuFeS2)

Tiger's Eye (Silicon Dioxide (SiO2) with fibrous inclusions) — mineral

Tiger's Eye

Silicon Dioxide (SiO2) with fibrous inclusions

Banded Metamorphic Rock (Gneiss or Schist) — metamorphic

Banded Metamorphic Rock

Gneiss or Schist

Schist with Quartz Veins (Schist with Quartz (SiO2)) — metamorphic

Schist with Quartz Veins

Schist with Quartz (SiO2)

Blue Apatite (Calcium Fluorophosphate (Ca5(PO4)3F)) — mineral

Blue Apatite

Calcium Fluorophosphate (Ca5(PO4)3F)

Schist (Mica Schist (Metamorphic rock)) — metamorphic

Schist

Mica Schist (Metamorphic rock)

Banded gneiss (Foliated silicate rock, typically quartz–feldspar–mica gneiss) — metamorphic

Banded gneiss

Foliated silicate rock, typically quartz–feldspar–mica gneiss

Magnetite (Iron Ore) (Magnetite (Fe3O4)) — mineral

Magnetite (Iron Ore)

Magnetite (Fe3O4)

Quartz with Schist Matrix (Crystalline Silicon Dioxide (SiO2) in micaceous schist) — metamorphic

Quartz with Schist Matrix

Crystalline Silicon Dioxide (SiO2) in micaceous schist

Eclogite (Eclogite (Omphacite + Pyrope)) — metamorphic

Eclogite

Eclogite (Omphacite + Pyrope)

Granitic Pegmatite (Granitic Pegmatite (principally Quartz, Potassium Feldspar, and Mica)) — igneous

Granitic Pegmatite

Granitic Pegmatite (principally Quartz, Potassium Feldspar, and Mica)

Pink Quartz (Silicon Dioxide (SiO2)) — mineral

Pink Quartz

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Schist (Metamorphic rock (Schist)) — metamorphic

Schist

Metamorphic rock (Schist)

Gneiss (Metamorphic rock (Gneiss)) — metamorphic

Gneiss

Metamorphic rock (Gneiss)

Blue Aventurine (Quartz (SiO2) with inclusions) — mineral

Blue Aventurine

Quartz (SiO2) with inclusions

Prehnite (Prehnite (Ca2Al(AlSi3O10)(OH)2)) — mineral

Prehnite

Prehnite (Ca2Al(AlSi3O10)(OH)2)