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

Opal (in Jewelry Setting) (Hydrated Silicon Dioxide (SiO2·nH2O)) — gemstone

Opal (in Jewelry Setting)

Hydrated Silicon Dioxide (SiO2·nH2O)

Garnet Schist (Almandine-Garnet Schist) — metamorphic

Garnet Schist

Almandine-Garnet Schist

Limonite (Hydrated Iron Oxide / Bog Iron) (FeO(OH)·nH2O) — Mineral (Sedimentary context)

Limonite (Hydrated Iron Oxide / Bog Iron)

FeO(OH)·nH2O

Mineral (Sedimentary context)

Blue Apatite (Fluorapatite (Ca5(PO4)3F)) — mineral

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Blue Chalcedony (Tumbled) (Silicon Dioxide (SiO2)) — mineral

Blue Chalcedony (Tumbled)

Silicon Dioxide (SiO2)

Pyrite (Fool's Gold) (Iron Sulfide (FeS2)) — mineral

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Emerald (Tumbled Beryl) (Beryllium Aluminum Silicate (Be3Al2Si6O18) with Chromium/Vanadium impurities) — mineral

Emerald (Tumbled Beryl)

Beryllium Aluminum Silicate (Be3Al2Si6O18) with Chromium/Vanadium impurities

Labradorite (Small Tumbled or Water-Worn Fragment) ((Ca,Na)(Al,Si)4O8) — mineral

Labradorite (Small Tumbled or Water-Worn Fragment)

(Ca,Na)(Al,Si)4O8

Pyrite (Fool's Gold) in Matrix (Iron Disulfide (FeS2)) — mineral

Pyrite (Fool's Gold) in Matrix

Iron Disulfide (FeS2)

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

Green Fluorite

Fluorite (Calcium Fluoride, CaF2)

Limonite (Iron Ore) (Limonite (Hydrous ferric oxides), generic formula FeO(OH)·nH2O) — mineral

Limonite (Iron Ore)

Limonite (Hydrous ferric oxides), generic formula FeO(OH)·nH2O

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

Blue Kyanite (Kyanite (Al2SiO5)) — mineral

Blue Kyanite

Kyanite (Al2SiO5)

Rough Emerald (Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities) — gemstone

Rough Emerald

Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities

Garnet Schist (Almandine-Mica Schist) — metamorphic

Garnet Schist

Almandine-Mica Schist

Siltstone (Siltstone (composed of mixed silicate minerals and clay)) — sedimentary

Siltstone

Siltstone (composed of mixed silicate minerals and clay)

Serpentine (Greenstone) (Antigorite, Lizardite, and Chrysolite mixture (Mg3Si2O5(OH)4)) — metamorphic

Serpentine (Greenstone)

Antigorite, Lizardite, and Chrysolite mixture (Mg3Si2O5(OH)4)

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

Gneiss

Metamorphic Gneiss (High-grade regional metamorphism)

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

Gneiss

Metamorphic Gneiss (High-grade regional metamorphism)

Basalt with Epidote (Porphyry) (Basalt (with inclusions of Epidote/Feldspar)) — igneous

Basalt with Epidote (Porphyry)

Basalt (with inclusions of Epidote/Feldspar)

Quartz-rich limestone or calcitic marble (Calcite (CaCO₃), possibly with quartz (SiO₂)) — metamorphic

Quartz-rich limestone or calcitic marble

Calcite (CaCO₃), possibly with quartz (SiO₂)

Limonite (Iron Ore) (Limonite (FeO(OH)·nH2O)) — mineral

Limonite (Iron Ore)

Limonite (FeO(OH)·nH2O)

Banded Gneiss (Gneiss (Metamorphic Rock)) — metamorphic

Banded Gneiss

Gneiss (Metamorphic Rock)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Gneiss (High-grade Metamorphic Gneiss) — metamorphic

Gneiss

High-grade Metamorphic Gneiss

Moonstone (Orthoclase Feldspar (KAlSi3O8) or Albite mixtures) — mineral

Moonstone

Orthoclase Feldspar (KAlSi3O8) or Albite mixtures

Blue Calcite (Calcium Carbonate (CaCO3)) — mineral

Blue Calcite

Calcium Carbonate (CaCO3)

Garnet Schist (Almandine-mica schist) — metamorphic

Garnet Schist

Almandine-mica schist

Pyrite (Iron Disulfide (FeS2)) — mineral

Pyrite

Iron Disulfide (FeS2)

Pyrite-rich Ore (Pyrite (FeS2) with secondary minerals) — mineral

Pyrite-rich Ore

Pyrite (FeS2) with secondary minerals

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Pyrite (Iron Pyrites) (Iron Sulfide (FeS2)) — mineral

Pyrite (Iron Pyrites)

Iron Sulfide (FeS2)

Gossan (Iron Hat) (Limonitic Gossan (predominantly FeO(OH)·nH2O)) — igneous/metamorphic derivative

Gossan (Iron Hat)

Limonitic Gossan (predominantly FeO(OH)·nH2O)

igneous/metamorphic derivative

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

Gneiss

High-grade regional metamorphic rock (Foliated)

Ferruginous Sandstone (Clastic sedimentary rock (SiO2 with Fe2O3/FeO(OH) cement)) — sedimentary

Ferruginous Sandstone

Clastic sedimentary rock (SiO2 with Fe2O3/FeO(OH) cement)

Anthracite (Anthracite Coal (C)) — sedimentary

Anthracite

Anthracite Coal (C)

Glauconitic Sandstone (Greensand) (Glauconitic Sandstone ((K, Na)(Fe3+, Al, Mg)2(Si, Al)4O10(OH)2)) — sedimentary

Glauconitic Sandstone (Greensand)

Glauconitic Sandstone ((K, Na)(Fe3+, Al, Mg)2(Si, Al)4O10(OH)2)

Schist (Kyanite Schist) (Kyanite-Mica Schist (primarily Al2SiO5, KAl2(AlSi3O10)(OH)2, and SiO2)) — metamorphic

Schist (Kyanite Schist)

Kyanite-Mica Schist (primarily Al2SiO5, KAl2(AlSi3O10)(OH)2, and SiO2)

Mica Schist (Mica Schist (primarily composed of Muscovite/Biotite)) — metamorphic

Mica Schist

Mica Schist (primarily composed of Muscovite/Biotite)

Limonite (with Goethite/Ironstone) (FeO(OH)·nH2O (Hydrated Iron Oxide)) — mineral

Limonite (with Goethite/Ironstone)

FeO(OH)·nH2O (Hydrated Iron Oxide)

Likely tumbled calcite or pale limestone fragment (Calcite (CaCO₃), possibly microcrystalline limestone) — mineral

Likely tumbled calcite or pale limestone fragment

Calcite (CaCO₃), possibly microcrystalline limestone