Rock Identifier

Category

Metamorphic (Pseudo Igneous)

Browse metamorphic (pseudo igneous) specimens identified by the Rock Identifier community.

Learn about Metamorphic (Pseudo Igneous) in the encyclopedia

Cordierite Hornfels

Cordierite Hornfels

Migmatite

Hornblende Schist

Hornblende Schist

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

Muscovite Mica

Muscovite (Potassium Aluminum Silicate Hydroxide), KAl2(AlSi3O10)(OH)2

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

Muscovite Mica

Muscovite, KAl2(AlSi3O10)(OH)2

Pink Feldspar (Potassium Feldspar (KAlSi3O8)) — mineral

Pink Feldspar

Potassium Feldspar (KAlSi3O8)

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

Muscovite Mica

Muscovite [KAl2(AlSi3O10)(OH)2]

Biotite on Quartz Matrix (Biotite - K(Mg,Fe)3(AlSi3O10)(OH,F)2 with Quartz (SiO2)) — mineral

Biotite on Quartz Matrix

Biotite - K(Mg,Fe)3(AlSi3O10)(OH,F)2 with Quartz (SiO2)

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

Biotite (Mica)

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

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

Orthoclase Feldspar

Potassium Aluminum Silicate (KAlSi3O8)

Ruby Zoisite (Anyolite (Composition of Green Zoisite, Black Tschermakite, and Red Corundum)) — metamorphic

Ruby Zoisite

Anyolite (Composition of Green Zoisite, Black Tschermakite, and Red Corundum)

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

Muscovite Mica

Muscovite - KAl2(AlSi3O10)(OH)2

Magnetite or Hematite-rich Ore (Magnetite (Fe3O4) or Hematite (Fe2O3)) — mineral

Magnetite or Hematite-rich Ore

Magnetite (Fe3O4) or Hematite (Fe2O3)

Uncertain gray metamorphic rock, likely gneiss or schist (Quartz–feldspar–mica rock; exact identification requires close examination) — metamorphic

Uncertain gray metamorphic rock, likely gneiss or schist

Quartz–feldspar–mica rock; exact identification requires close examination

Gneiss (River Cobble) (Metamorphic Gneiss) — metamorphic

Gneiss (River Cobble)

Metamorphic Gneiss

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Likely biotite mica (Biotite, a dark mica-group mineral; approximate formula K(Mg,Fe)₃AlSi₃O₁₀(F,OH)₂) — mineral

Likely biotite mica

Biotite, a dark mica-group mineral; approximate formula K(Mg,Fe)₃AlSi₃O₁₀(F,OH)₂

Biotite Schist (Biotite Gneissic Schist (K(Mg,Fe)3AlSi3O10(OH)2)) — metamorphic

Biotite Schist

Biotite Gneissic Schist (K(Mg,Fe)3AlSi3O10(OH)2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Epidote with Quartz Vein (Epidote-bearing metamorphic rock with quartz (Ca2(Al,Fe)3(SiO4)3(OH))) — metamorphic

Epidote with Quartz Vein

Epidote-bearing metamorphic rock with quartz (Ca2(Al,Fe)3(SiO4)3(OH))

Banded Gneiss (Gneiss (Metamorphic Rock)) — metamorphic

Banded Gneiss

Gneiss (Metamorphic Rock)

Schist (Metamorphic Rock (Schist)) — metamorphic

Schist

Metamorphic Rock (Schist)

Garnet (Garnet (X3Y2(SiO4)3)) — mineral

Garnet

Garnet (X3Y2(SiO4)3)

Gneiss (Gneiss (Metamorphic rock)) — metamorphic

Gneiss

Gneiss (Metamorphic rock)

Fossilized shell fragment, likely bivalve (Bivalvia indet.; commonly preserved as calcite (CaCO₃) shell material) — fossil

Fossilized shell fragment, likely bivalve

Bivalvia indet.; commonly preserved as calcite (CaCO₃) shell material

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

Biotite Mica

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

Tumbled white quartz pebble (Quartz, silicon dioxide (SiO₂), likely milky quartz) — mineral

Tumbled white quartz pebble

Quartz, silicon dioxide (SiO₂), likely milky quartz

Quartz (Smoky/Clear variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Smoky/Clear variety)

Silicon Dioxide (SiO2)

Quartz (likely a form of massive or vein quartz) (Quartz (SiO₂)) — Mineral

Quartz (likely a form of massive or vein quartz)

Quartz (SiO₂)

Milky quartz with possible feldspar (Quartz (SiO₂), possibly intergrown with feldspar) — mineral

Milky quartz with possible feldspar

Quartz (SiO₂), possibly intergrown with feldspar

Small pale mineral/rock fragment (Indeterminate; possibly weathered quartz, calcite, or light-colored limestone) — mineral

Small pale mineral/rock fragment

Indeterminate; possibly weathered quartz, calcite, or light-colored limestone

Milky Quartz (Silicon dioxide (SiO2)) — mineral

Milky Quartz

Silicon dioxide (SiO2)

Quartz (Milky or Cloudy Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky or Cloudy Quartz)

Silicon Dioxide (SiO2)

Ferruginous Quartz (Quartz (Silicon Dioxide) - SiO2 with Iron Oxide inclusions) — mineral

Ferruginous Quartz

Quartz (Silicon Dioxide) - SiO2 with Iron Oxide inclusions

Gold in Quartz Ore (Hydrothermal Quartz with native Gold (Au)) — mineral

Gold in Quartz Ore

Hydrothermal Quartz with native Gold (Au)

Leopardite (Quartz porphyry / Quartz monzonite with manganese oxide spots) — igneous

Leopardite

Quartz porphyry / Quartz monzonite with manganese oxide spots

Gneiss (Metamorphic Gneiss) — metamorphic

Gneiss

Metamorphic Gneiss

Foliated Gneiss (Gneiss (Metamorphic Rock)) — metamorphic

Foliated Gneiss

Gneiss (Metamorphic Rock)

Gneiss (Foliated Metamorphic Gneiss) — metamorphic

Gneiss

Foliated Metamorphic Gneiss

Gneiss (Gneissic Metamorphic Rock) — metamorphic

Gneiss

Gneissic Metamorphic Rock

Gneiss (Metamorphic Gneiss) — metamorphic

Gneiss

Metamorphic Gneiss

Greenschist (Greenschist (Chlorite Schist)) — metamorphic

Greenschist

Greenschist (Chlorite Schist)

Blue quartz-rich rock, possibly sodalite-bearing rock (Indeterminate blue silicate specimen; identification cannot be confirmed from the image) — metamorphic

Blue quartz-rich rock, possibly sodalite-bearing rock

Indeterminate blue silicate specimen; identification cannot be confirmed from the image

Serpentine (Serpentinite) (Serpentine group / Serpentinite (predominantly (Mg,Fe)3Si2O5(OH)4)) — metamorphic

Serpentine (Serpentinite)

Serpentine group / Serpentinite (predominantly (Mg,Fe)3Si2O5(OH)4)