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

Black Obsidian and Hematite (Volcanic Glass (SiO2) and Hematite (Fe2O3)) — igneous and mineral

Black Obsidian and Hematite

Volcanic Glass (SiO2) and Hematite (Fe2O3)

igneous and mineral

Aragonite Star Cluster (Cross-section) (Aragonite (Calcium Carbonate, CaCO3)) — mineral

Aragonite Star Cluster (Cross-section)

Aragonite (Calcium Carbonate, CaCO3)

Serpentine (Nephrite-like River Cobble) (Serpentinite (Hydrous Magnesium Iron Silicate)) — metamorphic

Serpentine (Nephrite-like River Cobble)

Serpentinite (Hydrous Magnesium Iron Silicate)

Chalcopyrite (Chalcopyrite (CuFeS2)) — Mineral

Chalcopyrite

Chalcopyrite (CuFeS2)

Dragon Vein Agate (Dyed/Fractured Quartz) (Silicon dioxide (SiO2)) — gemstone

Dragon Vein Agate (Dyed/Fractured Quartz)

Silicon dioxide (SiO2)

Basalt Pebble (Extrusive Igneous Rock) — igneous

Basalt Pebble

Extrusive Igneous Rock

Serpentinite (Serpentinite (composed primarily of Serpentine group minerals, e.g., Antigorite, Lizardite, or Chrysotile)) — metamorphic

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals, e.g., Antigorite, Lizardite, or Chrysotile)

Schist (Biotite/Mica Schist) (Medium-grade regional metamorphic rock (rich in Phyllosilicates)) — metamorphic

Schist (Biotite/Mica Schist)

Medium-grade regional metamorphic rock (rich in Phyllosilicates)

Serpentine (Antigorite/Chrysotile group ((Mg,Fe,Ni,Al,Zn,Mn)3(Si,Al,Fe)2O5(OH)4)) — metamorphic

Serpentine

Antigorite/Chrysotile group ((Mg,Fe,Ni,Al,Zn,Mn)3(Si,Al,Fe)2O5(OH)4)

Banded Serpentine (Serpentinite (Mg3Si2O5(OH)4)) — metamorphic

Banded Serpentine

Serpentinite (Mg3Si2O5(OH)4)

Cinnabar in Dolomite or Quartz (Cinnabrite) (Mercury sulfide (HgS) in Dolomite (CaMg(CO3)2)) — metamorphic

Cinnabar in Dolomite or Quartz (Cinnabrite)

Mercury sulfide (HgS) in Dolomite (CaMg(CO3)2)

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

Serpentinite

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

Serpentine (Serpentine Group (primarily Antigorite or Lizardite), Mg3Si2O5(OH)4) — metamorphic

Serpentine

Serpentine Group (primarily Antigorite or Lizardite), Mg3Si2O5(OH)4

Weathered quartz-rich metamorphic rock, possibly quartzite (Quartzite; predominantly quartz (SiO₂), with minor feldspar, mica, and iron-oxide staining) — metamorphic

Weathered quartz-rich metamorphic rock, possibly quartzite

Quartzite; predominantly quartz (SiO₂), with minor feldspar, mica, and iron-oxide staining

Blue Quartz (Dumortierite Quartz) (Silicon Dioxide (SiO2) with Dumortierite inclusion [Al7BO3(SiO4)3O3]) — mineral

Blue Quartz (Dumortierite Quartz)

Silicon Dioxide (SiO2) with Dumortierite inclusion [Al7BO3(SiO4)3O3]

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

Potassium Feldspar (Orthoclase)

KAlSi3O8 (Potassium Aluminum Silicate)

Limestone Fragment (Sedimentary rock (primarily Calcium Carbonate, CaCO3)) — sedimentary

Limestone Fragment

Sedimentary rock (primarily Calcium Carbonate, CaCO3)

Mica Schist (Mica Schist (Intermediate-grade Metamorphic Rock)) — metamorphic

Mica Schist

Mica Schist (Intermediate-grade Metamorphic Rock)

Banded Gneiss (River Cobble) (Gneiss (High-grade regional metamorphic rock)) — metamorphic

Banded Gneiss (River Cobble)

Gneiss (High-grade regional metamorphic rock)

Sandstone (Arenite (SiO2 primarily)) — sedimentary

Sandstone

Arenite (SiO2 primarily)

Beryl (likely Aquamarine or Heliodor variant) (Beryllium aluminum cyclosilicate (Be3Al2Si6O18)) — mineral

Beryl (likely Aquamarine or Heliodor variant)

Beryllium aluminum cyclosilicate (Be3Al2Si6O18)

Bornite (Peacock Ore) (Bornite (Cu5FeS4)) — mineral

Bornite (Peacock Ore)

Bornite (Cu5FeS4)

Green Aventurine (Quartz variant (SiO2) with Fuchsite inclusions) — mineral

Green Aventurine

Quartz variant (SiO2) with Fuchsite inclusions

Green Andesite (or Greenstone / Altered Volcanic Rock) (Intermediate Volcanic Rock with Chlorite/Epidote Alteration) — igneous

Green Andesite (or Greenstone / Altered Volcanic Rock)

Intermediate Volcanic Rock with Chlorite/Epidote Alteration

Ruby (varieties of Corundum) (Aluminum oxide (Al2O3) with Chromium traces) — mineral

Ruby (varieties of Corundum)

Aluminum oxide (Al2O3) with Chromium traces

Selentite (Gypsum (CaSO4·2H2O)) — mineral

Selentite

Gypsum (CaSO4·2H2O)

Amethyst Beads (Quartz (Silicon Dioxide, SiO2 with iron impurities)) — gemstone

Amethyst Beads

Quartz (Silicon Dioxide, SiO2 with iron impurities)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Shale (Fissile mudstone (Shale)) — sedimentary

Shale

Fissile mudstone (Shale)

Green aventurine quartzite (likely) (Quartz-rich metamorphic rock; predominantly microcrystalline quartz (SiO₂), with possible fuchsite, chlorite, or epidote) — metamorphic

Green aventurine quartzite (likely)

Quartz-rich metamorphic rock; predominantly microcrystalline quartz (SiO₂), with possible fuchsite, chlorite, or epidote

Tumbled serpentine with dark magnetite/chromite matrix (Serpentinite; chiefly antigorite/lizardite, Mg3Si2O5(OH)4, with magnetite and possibly chromite) — metamorphic

Tumbled serpentine with dark magnetite/chromite matrix

Serpentinite; chiefly antigorite/lizardite, Mg3Si2O5(OH)4, with magnetite and possibly chromite

Greenstone (likely serpentinite) (Serpentinite; mainly serpentine-group minerals, Mg₃Si₂O₅(OH)₄, with possible magnetite, chlorite, or other altered minerals) — metamorphic

Greenstone (likely serpentinite)

Serpentinite; mainly serpentine-group minerals, Mg₃Si₂O₅(OH)₄, with possible magnetite, chlorite, or other altered minerals

Quartzite (Metamorphic rock primarily composed of Quartz (SiO2)) — metamorphic

Quartzite

Metamorphic rock primarily composed of Quartz (SiO2)

Fossiliferous Shale or Slate with Plant Fossils (Fossil-bearing argillaceous rock) — Sedimentary/Metamorphic

Fossiliferous Shale or Slate with Plant Fossils

Fossil-bearing argillaceous rock

Sedimentary/Metamorphic

Raw Garnet Fragment (Nesosilicate Group (e.g., Almandine, Fe3Al2(SiO4)3)) — mineral

Raw Garnet Fragment

Nesosilicate Group (e.g., Almandine, Fe3Al2(SiO4)3)

Garnet (likely Almandine or Pyrope) (Garnet (Group Name), Fe3Al2(SiO4)3 or Mg3Al2(SiO4)3) — mineral

Garnet (likely Almandine or Pyrope)

Garnet (Group Name), Fe3Al2(SiO4)3 or Mg3Al2(SiO4)3

Rough Green Beryl (Emerald variety) (Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)) — mineral

Rough Green Beryl (Emerald variety)

Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)

Diamond (or Simulant) (Carbon (C) or Cubic Zirconia (ZrO2)) — gemstone

Diamond (or Simulant)

Carbon (C) or Cubic Zirconia (ZrO2)

Hematite (Iron Ore) (Iron(III) oxide (Fe2O3)) — mineral

Hematite (Iron Ore)

Iron(III) oxide (Fe2O3)

Turquoise (CuAl6(PO4)4(OH)8·4H2O (Hydrous phosphate of copper and aluminium)) — mineral

Turquoise

CuAl6(PO4)4(OH)8·4H2O (Hydrous phosphate of copper and aluminium)

Emerald (Beryl (Be3Al2Si6O18) with trace amounts of Chromium and/or Vanadium) — mineral

Emerald

Beryl (Be3Al2Si6O18) with trace amounts of Chromium and/or Vanadium

Diamond (C (Native Carbon)) — mineral

Diamond

C (Native Carbon)