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

Carnelian (Chalcedony (Silicon Dioxide, SiO2)) — mineral

Carnelian

Chalcedony (Silicon Dioxide, SiO2)

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

Carnelian

Silicon Dioxide (Quartz variety), SiO2

Chalcedony Agate Nodule (Silicon Dioxide (SiO2)) — mineral

Chalcedony Agate Nodule

Silicon Dioxide (SiO2)

Rhodochrosite (Manganese carbonate (MnCO3)) — mineral

Rhodochrosite

Manganese carbonate (MnCO3)

Sphalerite with Siderite and Pyrite (Zinc Sulfide (ZnS) with Iron Carbonate (FeCO3) and Iron Disulfide (FeS2)) — mineral

Sphalerite with Siderite and Pyrite

Zinc Sulfide (ZnS) with Iron Carbonate (FeCO3) and Iron Disulfide (FeS2)

Carnelian (Chalcedony (SiO2)) — mineral

Carnelian

Chalcedony (SiO2)

Pink Opal (Hydrated Silica (SiO2·nH2O) with Palygorskite/Sepiolite inclusions) — gemstone

Pink Opal

Hydrated Silica (SiO2·nH2O) with Palygorskite/Sepiolite inclusions

Chalcedony (Cryptocrystalline Quartz (SiO2)) — mineral

Chalcedony

Cryptocrystalline Quartz (SiO2)

Pink Opal (Hydrated silica (SiO2 "n H2O)) — mineral

Pink Opal

Hydrated silica (SiO2 "n H2O)

Variscite in Matrix (Variscite (AlPO4 · 2H2O)) — mineral

Variscite in Matrix

Variscite (AlPO4 · 2H2O)

Blue Chalcedony (Cryptocrystalline Quartz (SiO2)) — mineral

Blue Chalcedony

Cryptocrystalline Quartz (SiO2)

Blue Chalcedony (Silicon Dioxide (SiO2)) — mineral

Blue Chalcedony

Silicon Dioxide (SiO2)

Chalcedony (Common Opal or Agate variant) (Silicon Dioxide (SiO₂)) — mineral

Chalcedony (Common Opal or Agate variant)

Silicon Dioxide (SiO₂)

Pyrite with Calcite (Iron Disulfide (FeS2) with Calcium Carbonate (CaCO3)) — mineral

Pyrite with Calcite

Iron Disulfide (FeS2) with Calcium Carbonate (CaCO3)

Carnelian (Carnelian (a variety of Chalcedony), SiO2 (Silicon Dioxide)) — mineral

Carnelian

Carnelian (a variety of Chalcedony), SiO2 (Silicon Dioxide)

Carnelian (Carnelian (Chert/Chalcedony) - SiO2) — mineral

Carnelian

Carnelian (Chert/Chalcedony) - SiO2

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Chalcedony (Carnelian variety) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Carnelian variety)

Silicon Dioxide (SiO2)

Chalcedony (Agate/Carnelian variant) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Agate/Carnelian variant)

Silicon Dioxide (SiO2)

Chalcedony (Silicon Dioxide (SiO₂)) — mineral

Chalcedony

Silicon Dioxide (SiO₂)

Chert (Iron-stained) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Iron-stained)

Silicon Dioxide (SiO2)

Amethyst and Rose Quartz Jewelry (Silicon Dioxide (SiO2)) — gemstone

Amethyst and Rose Quartz Jewelry

Silicon Dioxide (SiO2)

Green Quartz (Prasiolite variant or Aventurine) (Silicon Dioxide (SiO2)) — mineral

Green Quartz (Prasiolite variant or Aventurine)

Silicon Dioxide (SiO2)

Chalcedony (Botryoidal) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — mineral

Chalcedony (Botryoidal)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Satin Spar (Gypsum) (Calcium Sulfate Dihydrate (CaSO4·2H2O)) — mineral

Satin Spar (Gypsum)

Calcium Sulfate Dihydrate (CaSO4·2H2O)

Satin Spar (Gypsum) (Calcium Sulfate Dihydrate (CaSO4·2H2O)) — mineral

Satin Spar (Gypsum)

Calcium Sulfate Dihydrate (CaSO4·2H2O)

Coarse Sand and River Gravel (Siliciclastic Sediment (primarily Quartz and Feldspar)) — sedimentary

Coarse Sand and River Gravel

Siliciclastic Sediment (primarily Quartz and Feldspar)

Shale or Mudstone (Argillaceous sedimentary rock) — sedimentary

Shale or Mudstone

Argillaceous sedimentary rock

Ocean Jasper (Spherulitic Chalcedony (SiO2)) — sedimentary

Ocean Jasper

Spherulitic Chalcedony (SiO2)

Pink Opal (Hydrated Silica (SiO2·nH2O)) — mineral

Pink Opal

Hydrated Silica (SiO2·nH2O)

Opal (Hydrated Amorphous Silica (SiO2·nH2O)) — Mineral

Opal

Hydrated Amorphous Silica (SiO2·nH2O)

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

Milky Quartz with inclusions

Silicon Dioxide (SiO2)

Peach Moonstone (Orthoclase (Potassium Aluminum Silicate, KAlSi3O8)) — mineral

Peach Moonstone

Orthoclase (Potassium Aluminum Silicate, KAlSi3O8)

Smoky Quartz (SiO2 (Silicon Dioxide)) — mineral

Smoky Quartz

SiO2 (Silicon Dioxide)

Shale (Shale (Lutite)) — sedimentary

Shale

Shale (Lutite)

Banded Serpentinite with Calcite Veins (Serpentinite (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4) — metamorphic

Banded Serpentinite with Calcite Veins

Serpentinite (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4

Emerald in Matrix (Beryl (Be3Al2Si6O18) containing Chromium/Vanadium impurities) — mineral

Emerald in Matrix

Beryl (Be3Al2Si6O18) containing Chromium/Vanadium impurities

Anthracite (Anthracite Coal) — metamorphic

Anthracite

Anthracite Coal

Hessonite Garnet (Grossular) (Ca3Al2(SiO4)3 (Grossular Garnet)) — gemstone

Hessonite Garnet (Grossular)

Ca3Al2(SiO4)3 (Grossular Garnet)

Lapis Lazuli (Na8[Al6Si6O24]Sn (Lazurite-rich metamorphic rock)) — metamorphic

Lapis Lazuli

Na8[Al6Si6O24]Sn (Lazurite-rich metamorphic rock)

Ironstone Concretion (likely) (Goethite/Hematite/Limonite cemented sediment) — Sedimentary Rock

Ironstone Concretion (likely)

Goethite/Hematite/Limonite cemented sediment

Sedimentary Rock

Banded Quartzite or Gneissic Pebble (Quartzite with mafic inclusions (SiO2) or Banded Gneiss) — metamorphic

Banded Quartzite or Gneissic Pebble

Quartzite with mafic inclusions (SiO2) or Banded Gneiss