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

Weathered Pyrite Nodule (Iron Sulfide (FeS2) undergoing oxidation to limonite/goethite) — mineral

Weathered Pyrite Nodule

Iron Sulfide (FeS2) undergoing oxidation to limonite/goethite

Garnet (Polished) (Nesosilicate (Group formula: X3Y2(SiO4)3)) — gemstone

Garnet (Polished)

Nesosilicate (Group formula: X3Y2(SiO4)3)

Blue Calcite (Calcium Carbonate (CaCO3)) — mineral

Blue Calcite

Calcium Carbonate (CaCO3)

Basalt (Greenstone) (Mafic volcanic rock (Basalt)) — igneous

Basalt (Greenstone)

Mafic volcanic rock (Basalt)

Green Jasper (Chert) (Microcrystalline Quartz (SiO2) with iron/clay inclusion) — sedimentary

Green Jasper (Chert)

Microcrystalline Quartz (SiO2) with iron/clay inclusion

Schist (Mica Schist) — metamorphic

Schist

Mica Schist

Banded Gneiss (Gneiss (High-grade Regional Metamorphic Rock)) — metamorphic

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Gneiss with Quartz Veining (Gneiss (High-grade regional metamorphic rock)) — metamorphic

Gneiss with Quartz Veining

Gneiss (High-grade regional metamorphic rock)

Clear Quartz (Rock Crystal) (Silicon Dioxide (SiO2)) — mineral

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Blue Apatite (Apatite (Ca5(PO4)3(F,Cl,OH))) — mineral

Blue Apatite

Apatite (Ca5(PO4)3(F,Cl,OH))

Banded Gneiss (Gneiss (Foliated Metamorphic Rock)) — metamorphic

Banded Gneiss

Gneiss (Foliated Metamorphic Rock)

Gneiss (Gneiss (foliated metamorphic rock)) — metamorphic

Gneiss

Gneiss (foliated metamorphic rock)

River Rock (Gneiss/Schist mix) (Foliated Metamorphic Rock (Gneiss)) — metamorphic

River Rock (Gneiss/Schist mix)

Foliated Metamorphic Rock (Gneiss)

Serpentinite (Serpentinite (composed primarily of Serpentine group minerals: (Mg, Fe)3Si2O5(OH)4)) — metamorphic

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals: (Mg, Fe)3Si2O5(OH)4)

Weathered, quartz-rich metamorphic rock (likely schist or gneiss) (Quartz–feldspar–mica schist/gneiss, with surface lichens and iron-oxide staining) — metamorphic

Weathered, quartz-rich metamorphic rock (likely schist or gneiss)

Quartz–feldspar–mica schist/gneiss, with surface lichens and iron-oxide staining

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

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

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Quartz (Drusy/Crystalline) (Silicon Dioxide (SiO2)) — mineral

Quartz (Drusy/Crystalline)

Silicon Dioxide (SiO2)

Banded Gneiss (Banded Orthogneiss or Paragneiss (Quartz-Feldspathic Gneiss)) — metamorphic

Banded Gneiss

Banded Orthogneiss or Paragneiss (Quartz-Feldspathic Gneiss)

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

Granitic Gneiss

Gneiss (High-grade regional metamorphic rock)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Banded Gneiss Pebble (Banded Gneiss) — metamorphic

Banded Gneiss Pebble

Banded Gneiss

Kyanite (Kyanite (Al2SiO5)) — Mineral

Kyanite

Kyanite (Al2SiO5)

Quartzite River Stone (Metamorphosed Quartz-rich Sandstone (SiO2)) — metamorphic

Quartzite River Stone

Metamorphosed Quartz-rich Sandstone (SiO2)

Pyrite (Iron Disulfide (FeS2)) — mineral

Pyrite

Iron Disulfide (FeS2)

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

Turquoise

Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]

Quartz Vein in Matrix (Breccia / Host Rock with Quartz) (Silicon Dioxide (SiO2) in Host Rock Matrix) — metamorphic

Quartz Vein in Matrix (Breccia / Host Rock with Quartz)

Silicon Dioxide (SiO2) in Host Rock Matrix

Unidentified weathered rock fragments (Likely mixed silicate rocks; specific identification requires testing) — mineral

Unidentified weathered rock fragments

Likely mixed silicate rocks; specific identification requires testing

Banded Gneiss (Gneiss (High-grade Metamorphic Rock)) — metamorphic

Banded Gneiss

Gneiss (High-grade Metamorphic Rock)

Amethyst with Marcasite accents (Amethyst (Silicon Dioxide SiO2) and Marcasite (Iron Sulfide FeS2)) — mineral

Amethyst with Marcasite accents

Amethyst (Silicon Dioxide SiO2) and Marcasite (Iron Sulfide FeS2)

Gneiss (Metamorphic Cobble) (Gneiss (High-grade Regional Metamorphic Rock)) — metamorphic

Gneiss (Metamorphic Cobble)

Gneiss (High-grade Regional Metamorphic Rock)

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

Rough Emerald

Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities

White Marble (Recrystallized Calcite (CaCO3)) — metamorphic

White Marble

Recrystallized Calcite (CaCO3)

Banded Gneiss (Gneiss (Metamorphic rock)) — metamorphic

Banded Gneiss

Gneiss (Metamorphic rock)

Gneiss (Foliated Metamorphic Gneiss) — metamorphic

Gneiss

Foliated Metamorphic Gneiss

Pyrite Cubes in Matrix (Iron Disulfide (FeS2) in Host Matrix) — mineral side rock

Pyrite Cubes in Matrix

Iron Disulfide (FeS2) in Host Matrix

mineral side rock

Banded Gneiss (Gneiss (High-grade Regional Metamorphic Rock)) — metamorphic

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

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

Banded Gneiss

Gneiss (High-grade regional metamorphic rock)

Prehnite (Prehnite (Ca2Al2Si3O10(OH)2)) — mineral

Prehnite

Prehnite (Ca2Al2Si3O10(OH)2)

Crinoid Marble (Crinoidal Limestone/Marble) — fossil

Crinoid Marble

Crinoidal Limestone/Marble