Rock Identifier

Category

Sedimentary Or Metamorphic (Low Grade)

Browse sedimentary or metamorphic (low grade) specimens identified by the Rock Identifier community.

Learn about Sedimentary Or Metamorphic (Low Grade) in the encyclopedia

Greenschist

Slate

Lignite

Calcilutite

Calcirudite

Grape Garnet

Grape Agate

Granulite

Chlorite Schist

Chlorite Schist

Turbidite

Conglomerate

Greenstone

Banded Gneiss (Gneiss (Metamorphic Rock)) — metamorphic

Banded 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

Carnelian (Chalcedony) (SiO2 (Silicon Dioxide with iron oxide inclusions)) — gemstone

Carnelian (Chalcedony)

SiO2 (Silicon Dioxide with iron oxide inclusions)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Blue Chalcedony (Silicon Dioxide (SiO2)) — mineral

Blue Chalcedony

Silicon Dioxide (SiO2)

Granitoid (Granite/Gneiss) (Granitoid silicate rock, primarily quartz and feldspar) — igneous/metamorphic

Granitoid (Granite/Gneiss)

Granitoid silicate rock, primarily quartz and feldspar

igneous/metamorphic

Mixed collection of common river stones (Varied lithologies, visibly including quartz-rich rock, dark mafic rock, sandstone, and purple quartz-bearing material) — igneous, sedimentary, metamorphic

Mixed collection of common river stones

Varied lithologies, visibly including quartz-rich rock, dark mafic rock, sandstone, and purple quartz-bearing material

igneous, sedimentary, metamorphic

Mixed mineral and rock collection (Predominantly quartz varieties, including amethyst, plus likely calcite, feldspar, mica, and miscellaneous polished stones) — mineral

Mixed mineral and rock collection

Predominantly quartz varieties, including amethyst, plus likely calcite, feldspar, mica, and miscellaneous polished stones

Carnelian (Silicon Dioxide (Quartz variety), SiO2) — mineral

Carnelian

Silicon Dioxide (Quartz variety), SiO2

Ocean Jasper (Orbicular Jasper (Silicon Dioxide SiO2)) — sedimentary

Ocean Jasper

Orbicular Jasper (Silicon Dioxide SiO2)

Ruby (Faceted) (Corundum (Al2O3 with Cr trace elements)) — gemstone

Ruby (Faceted)

Corundum (Al2O3 with Cr trace elements)

Raw Emerald (Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)) — mineral

Raw Emerald

Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)

Schist (Mica Schist) — metamorphic

Schist

Mica Schist

Red Jasper (Silicon Dioxide (SiO2) with iron oxide inclusions) — sedimentary

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Banded Gneiss (Metamorphic Gneiss) — metamorphic

Banded Gneiss

Metamorphic Gneiss

Chert (Silicon dioxide (SiO2)) — Sedimentary

Chert

Silicon dioxide (SiO2)

Pink Sapphire (Corundum (Al2O3 with Chromium/Titanium/Iron traces)) — mineral

Pink Sapphire

Corundum (Al2O3 with Chromium/Titanium/Iron traces)

Alexandrite in Matrix (Chrysoberyl (BeAl2O4 with Chromium impurities)) — mineral

Alexandrite in Matrix

Chrysoberyl (BeAl2O4 with Chromium impurities)

Jadeite (Jadeite (NaAlSi2O6)) — metamorphic

Jadeite

Jadeite (NaAlSi2O6)

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

Milky quartz fragment

Quartz (silicon dioxide, SiO₂)

Gneiss (High-grade Metamorphic Gneiss) — metamorphic

Gneiss

High-grade Metamorphic Gneiss

Gneiss (Gneiss (High-grade metamorphic rock)) — metamorphic

Gneiss

Gneiss (High-grade metamorphic rock)

Sapphire Rough (Corundum) (Corundum (Aluminum Oxide, Al2O3)) — mineral

Sapphire Rough (Corundum)

Corundum (Aluminum Oxide, Al2O3)

Gneiss (Metamorphic Gneiss) — metamorphic

Gneiss

Metamorphic Gneiss

Green Fluorite (Fluorite (Calcium Fluoride, CaF2)) — mineral

Green Fluorite

Fluorite (Calcium Fluoride, CaF2)

Light-colored quartz-rich stone, possibly milky quartz (Quartz (SiO₂), provisional identification) — mineral

Light-colored quartz-rich stone, possibly milky quartz

Quartz (SiO₂), provisional identification

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

White Agate / Chalcedony (Silicon Dioxide (SiO2)) — gemstone

White Agate / Chalcedony

Silicon Dioxide (SiO2)

Blue Kyanite (Kyanite (Al2SiO5)) — mineral

Blue Kyanite

Kyanite (Al2SiO5)

Emerald / Fluorite (Beryl (Be3Al2Si6O18) / Fluorite (CaF2)) — mineral

Emerald / Fluorite

Beryl (Be3Al2Si6O18) / Fluorite (CaF2)

Ruby (Corundum) (Al2O3 (Aluminium oxide with Chromium impurities)) — Mineral

Ruby (Corundum)

Al2O3 (Aluminium oxide with Chromium impurities)

Weathered garnet-bearing gneiss (Quartz–feldspar–mica gneiss with almandine garnet, chiefly Fe₃Al₂(SiO₄)₃) — metamorphic

Weathered garnet-bearing gneiss

Quartz–feldspar–mica gneiss with almandine garnet, chiefly Fe₃Al₂(SiO₄)₃

Green Opal (Hydrated Silica (SiO2·nH2O)) — mineraloid

Green Opal

Hydrated Silica (SiO2·nH2O)

Limonite (FeO(OH)·nH2O (Hydrated iron oxide-hydroxide)) — mineral

Limonite

FeO(OH)·nH2O (Hydrated iron oxide-hydroxide)

Garnet Schist (Almandine Garnet in Mica Schist) — metamorphic

Garnet Schist

Almandine Garnet in Mica Schist

Anthracite Coal (Anthracite) — metamorphic

Anthracite Coal

Anthracite

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Pyrite Cube in Matrix (Iron Sulfide (FeS2)) — mineral

Pyrite Cube in Matrix

Iron Sulfide (FeS2)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Pyrite in Quartzite/Graphite Matrix (Iron Sulfide (FeS2)) — Mineral

Pyrite in Quartzite/Graphite Matrix

Iron Sulfide (FeS2)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Limonite pseudo-concretion (Ironstone) (Limonite (FeO(OH)·nH2O) / Goethite) — sedimentary

Limonite pseudo-concretion (Ironstone)

Limonite (FeO(OH)·nH2O) / Goethite