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

Natural freshwater pearls (Pearl (nacreous calcium carbonate; chiefly aragonite, CaCO₃)) — gemstone

Natural freshwater pearls

Pearl (nacreous calcium carbonate; chiefly aragonite, CaCO₃)

Garnet Gneiss (Garnetiferous quartzo-feldspathic gneiss) — metamorphic

Garnet Gneiss

Garnetiferous quartzo-feldspathic gneiss

Emerald (Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)) — gemstone

Emerald

Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)

Dumortierite Quartz (Dumortierite-bearing Quartz (SiO2 with Al7BO3(SiO4)3O3)) — mineral

Dumortierite Quartz

Dumortierite-bearing Quartz (SiO2 with Al7BO3(SiO4)3O3)

Tumbled Ruby (Corundum (Al2O3:Cr)) — gemstone

Tumbled Ruby

Corundum (Al2O3:Cr)

Banded Gneiss (Gneiss (Metamorphic Rock)) — metamorphic

Banded Gneiss

Gneiss (Metamorphic Rock)

Gneiss (Metamorphic Foliated Gneiss) — metamorphic

Gneiss

Metamorphic Foliated Gneiss

Gneiss (Gneiss (Metamorphic Rock)) — metamorphic

Gneiss

Gneiss (Metamorphic Rock)

Foliated Metamorphic Rock (likely Gneiss or Schist) (Gneissic Metamorphic Rock) — metamorphic

Foliated Metamorphic Rock (likely Gneiss or Schist)

Gneissic Metamorphic Rock

Gneiss and Igneous Rock Collection (Foliated Metamorphic Rock (Gneiss) / Igneous Rocks) — metamorphic

Gneiss and Igneous Rock Collection

Foliated Metamorphic Rock (Gneiss) / Igneous Rocks

Pyrite (Iron Pyrite (FeS₂)) — Mineral

Pyrite

Iron Pyrite (FeS₂)

Quartz vein in host rock (Quartz (SiO₂), likely milky quartz; host rock is uncertain from the photo) — metamorphic

Quartz vein in host rock

Quartz (SiO₂), likely milky quartz; host rock is uncertain from the photo

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

Milky and Ferruginous Quartz

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

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

White Quartz (Milky Quartz)

Quartz (Silicon Dioxide - SiO2)

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

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

Quartz Vein in Host Rock (Silicon Dioxide (SiO2) vein cutting through host rock) — mineral

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) vein cutting through host rock

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Yellow Quartz (Citrine/Yellow Jasper mix) (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz (Citrine/Yellow Jasper mix)

Silicon Dioxide (SiO2)

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Epidote

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

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

Magnetite

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

Banded Gneiss (Gneiss) — metamorphic

Banded Gneiss

Gneiss

Epidote (Epidote - Ca2(Al2,Fe3+)3(SiO4)3(OH)) — mineral

Epidote

Epidote - Ca2(Al2,Fe3+)3(SiO4)3(OH)

Epidote (Epidote ({Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH))) — mineral

Epidote

Epidote ({Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH))

Pyrite (on the right) and Magnetite or Hematite (on the left) (Iron Sulfide (FeS2) and Iron Oxide (Fe3O4 or Fe2O3)) — mineral

Pyrite (on the right) and Magnetite or Hematite (on the left)

Iron Sulfide (FeS2) and Iron Oxide (Fe3O4 or Fe2O3)

Gneiss (Metamorphic Gneiss) — metamorphic

Gneiss

Metamorphic Gneiss

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Milky quartz fragment (Quartz (SiO₂)) — mineral

Milky quartz fragment

Quartz (SiO₂)

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

Tumbled milky quartz

Quartz (silicon dioxide, SiO₂)

Tumbled quartz-rich pebble (Quartz (SiO₂), likely with iron-oxide staining and minor inclusions) — mineral

Tumbled quartz-rich pebble

Quartz (SiO₂), likely with iron-oxide staining and minor inclusions

Milky quartz fragment (Quartz (silicon dioxide, SiO₂)) — mineral

Milky quartz fragment

Quartz (silicon dioxide, SiO₂)

Specular Hematite (Specularite) (Iron(III) oxide (Fe2O3)) — mineral

Specular Hematite (Specularite)

Iron(III) oxide (Fe2O3)

Coarse-grained granite or granitic pegmatite fragment (Granite; primarily quartz, feldspar, and mica) — igneous

Coarse-grained granite or granitic pegmatite fragment

Granite; primarily quartz, feldspar, and mica

Polished operculum (“Shiva eye” shell) (Calcium-carbonate shell operculum, commonly from a turban snail (family Turbinidae); not a mineral specimen) — fossil

Polished operculum (“Shiva eye” shell)

Calcium-carbonate shell operculum, commonly from a turban snail (family Turbinidae); not a mineral specimen

Weathered metamorphic rock, possibly schist or gneiss (Indeterminate; likely quartz–feldspar–mica rock, potentially greenschist or gneiss) — metamorphic

Weathered metamorphic rock, possibly schist or gneiss

Indeterminate; likely quartz–feldspar–mica rock, potentially greenschist or gneiss

Tumbled quartz-rich stone, likely milky quartz (Quartz (SiO₂), possibly iron-stained milky quartz or quartzite) — mineral

Tumbled quartz-rich stone, likely milky quartz

Quartz (SiO₂), possibly iron-stained milky quartz or quartzite

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Corundum (Sapphire in Host Rock) (Corundum (Aluminum Oxide, Al2O3)) — mineral

Corundum (Sapphire in Host Rock)

Corundum (Aluminum Oxide, Al2O3)