Rock Identifier

Category

Sedimentary Or Metamorphic

Browse sedimentary or metamorphic specimens identified by the Rock Identifier community.

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

Quartz (Milky Quartz)

Silicon Dioxide (SiO₂)

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

Pyrite (Iron Pyrite)

Iron Sulfide (FeS2)

mineral
Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

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

Clear Quartz Crystal

Silicon Dioxide (SiO2)

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

Hematite

Iron(III) oxide (Fe2O3)

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

Clear Quartz Crystal Cluster

Silicon Dioxide (SiO2)

mineral
Rough Emerald (Beryl) (Emerald (Be3Al2(SiO3)6 with Cr/V impurities)) — mineral

Rough Emerald (Beryl)

Emerald (Be3Al2(SiO3)6 with Cr/V impurities)

mineral
Quartz (Milky/Smoky variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky/Smoky variety)

Silicon Dioxide (SiO2)

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

Clear Quartz

Silicon Dioxide (SiO2)

mineral
Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

mineral
Quartz (Milky or Rough Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky or Rough Quartz)

Silicon Dioxide (SiO2)

mineral
Arkosic Sandstone (or Conglomeritic Sandstone fragment) (Arkose (rich in feldspar)) — sedimentary

Arkosic Sandstone (or Conglomeritic Sandstone fragment)

Arkose (rich in feldspar)

sedimentary
Coarse Sand Grain / Lithic Fragment (Clastic Sediment (Lithic fragment or Quartz/Feldspar grain)) — sedimentary

Coarse Sand Grain / Lithic Fragment

Clastic Sediment (Lithic fragment or Quartz/Feldspar grain)

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

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

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

Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

metamorphic
Nephrite Jade (Nephrite (a variety of the mineral actinolite within the amphibole group); Chemical Formula: Ca2(Mg,Fe)5Si8O22(OH)2) — Mineral

Nephrite Jade

Nephrite (a variety of the mineral actinolite within the amphibole group); Chemical Formula: Ca2(Mg,Fe)5Si8O22(OH)2

Mineral
Banded Gneiss (Gneiss (Metamorphic high-grade rock)) — metamorphic

Banded Gneiss

Gneiss (Metamorphic high-grade rock)

metamorphic
Banded Gneiss (Gneiss (Metamorphic high-grade rock)) — metamorphic

Banded Gneiss

Gneiss (Metamorphic high-grade rock)

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

Gneiss

Gneiss (High-grade regional metamorphic rock)

metamorphic
Schist (Mica Schist (primarily Muscovite or Biotite sheet silicates)) — metamorphic

Schist

Mica Schist (primarily Muscovite or Biotite sheet silicates)

metamorphic
Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

metamorphic
Gneiss (with Quartz-Feldspar vein) (Gneiss (high-grade metamorphic rock) containing Quartz (SiO2) and Feldspar (KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8)) — metamorphic

Gneiss (with Quartz-Feldspar vein)

Gneiss (high-grade metamorphic rock) containing Quartz (SiO2) and Feldspar (KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8)

metamorphic
Banded River Rock / Gneiss (highly weathered) (Gneiss) — Metamorphic rock

Banded River Rock / Gneiss (highly weathered)

Gneiss

Metamorphic rock
Petrified Wood (Silicified Wood (SiO2)) — metamorphic

Petrified Wood

Silicified Wood (SiO2)

metamorphic
Petrified Wood (Silicified Wood (SiO2)) — metamorphic

Petrified Wood

Silicified Wood (SiO2)

metamorphic
Petrified Wood (Silicified Wood (SiO2)) — metamorphic

Petrified Wood

Silicified Wood (SiO2)

metamorphic
Petrified Wood (Silicified Wood (primarily SiO₂ - Silicon Dioxide)) — metamorphic

Petrified Wood

Silicified Wood (primarily SiO₂ - Silicon Dioxide)

metamorphic
Petrified Wood (Silicified Wood (SiO2)) — metamorphic

Petrified Wood

Silicified Wood (SiO2)

metamorphic
Calcite (Calcite (CaCO3)) — mineral

Calcite

Calcite (CaCO3)

mineral
Quartz (in a rock matrix) (Quartz (SiO2)) — mineral

Quartz (in a rock matrix)

Quartz (SiO2)

mineral
Biotite Schist (likely) (Biotite Schist (rock), Biotite (mineral)) — Metamorphic

Biotite Schist (likely)

Biotite Schist (rock), Biotite (mineral)

Metamorphic
Garnet (Almandine variety) (Almandine, Fe3Al2(SiO4)3) — Mineral

Garnet (Almandine variety)

Almandine, Fe3Al2(SiO4)3

Mineral
Green Aventurine (Silicon Dioxide with Fuchsite (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)) — metamorphic

Green Aventurine

Silicon Dioxide with Fuchsite (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)

metamorphic
Quartz Veined Rock (Likely Graywacke or Quartzite) (Silicon Dioxide (SiO2) veins in Metasedimentary matrix) — metamorphic

Quartz Veined Rock (Likely Graywacke or Quartzite)

Silicon Dioxide (SiO2) veins in Metasedimentary matrix

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

mineral
White Quartz (Milky Quartz) (Silicon Dioxide (SiO2)) — mineral

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

mineral
Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

mineral
Magnetite (Magnetite (Fe3O4)) — mineral

Magnetite

Magnetite (Fe3O4)

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

Quartz (Clear Quartz/Rock Crystal)

Silicon Dioxide (SiO2)

mineral
Magnetite (Lodestone variety) (Magnetite (Iron(II,III) oxide, Fe3O4)) — mineral

Magnetite (Lodestone variety)

Magnetite (Iron(II,III) oxide, Fe3O4)

mineral
Quartz (Milky/Common variant) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky/Common variant)

Silicon Dioxide (SiO2)

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

mineral