Rock Identifier

Category

Igneous, Sedimentary, And Metamorphic Mix

Browse igneous, sedimentary, and metamorphic mix specimens identified by the Rock Identifier community.

Quartz Pebble (Iron-Stained) (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble (Iron-Stained)

Silicon Dioxide (SiO2)

Yellow Quartz (Citrinated Quartz) (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz (Citrinated Quartz)

Silicon Dioxide (SiO2)

Smoky Quartz (Smoky Quartz (SiO2 - Silicon Dioxide with aluminum impurities)) — mineral

Smoky Quartz

Smoky Quartz (SiO2 - Silicon Dioxide with aluminum impurities)

Agate (Banded Chalcedony (SiO2 - Silicon Dioxide)) — mineral

Agate

Banded Chalcedony (SiO2 - Silicon Dioxide)

Mica Schist (Foliated Metamorphic Rock (rich in Muscovite or Biotite)) — metamorphic

Mica Schist

Foliated Metamorphic Rock (rich in Muscovite or Biotite)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Schist with Schorl (Black Tourmaline) (NaFe3Al6(BO3)3Si6O18(OH)4 (Schorl)) — metamorphic

Schist with Schorl (Black Tourmaline)

NaFe3Al6(BO3)3Si6O18(OH)4 (Schorl)

Slate (Foliated Metamorphic Rock (primarily composed of quartz, illite, and chlorite)) — metamorphic

Slate

Foliated Metamorphic Rock (primarily composed of quartz, illite, and chlorite)

Gneiss (Granitic Gneiss) (Gneiss) — metamorphic

Gneiss (Granitic Gneiss)

Gneiss

Micaceous Schist (Mica Schist (primarily Muscovite or Biotite KAl2(AlSi3O10)(OH)2)) — metamorphic

Micaceous Schist

Mica Schist (primarily Muscovite or Biotite KAl2(AlSi3O10)(OH)2)

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

Schist

Mica Schist (primarily Muscovite or Biotite sheet silicates)

White Marble (Metamorphosed Limestone (principally CaCO3)) — metamorphic

White Marble

Metamorphosed Limestone (principally CaCO3)

Emerald (Beryl (Be₃Al₂(SiO₃)‑₆) with Chromium/Vanadium impurities) — mineral

Emerald

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

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

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

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

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Galena (Lead Sulfide (PbS)) — mineral

Galena

Lead Sulfide (PbS)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Specular Hematite (Specularite) (Iron Oxide (Fe2O3)) — mineral

Specular Hematite (Specularite)

Iron Oxide (Fe2O3)

Yellow Calcite (Calcium Carbonate (CaCO3)) — mineral

Yellow Calcite

Calcium Carbonate (CaCO3)

Quartz with Mica (likely Muscovite) (Silicon Dioxide (SiO2) with Potassium Aluminum Silicate Hydroxide Fluoride) — igneous/metamorphic

Quartz with Mica (likely Muscovite)

Silicon Dioxide (SiO2) with Potassium Aluminum Silicate Hydroxide Fluoride

igneous/metamorphic

Marble (Metamorphosed Limestone (calcite formulation CaCO3)) — metamorphic

Marble

Metamorphosed Limestone (calcite formulation CaCO3)

Quartz (Silicon Dioxide (SiO2)) — Mineral

Quartz

Silicon Dioxide (SiO2)

Blue Kyanite (Kyanite (Al2SiO5)) — mineral

Blue Kyanite

Kyanite (Al2SiO5)

Almandine Garnet in Matrix (Almandine Garnet (Fe3Al2(SiO4)3)) — metamorphic

Almandine Garnet in Matrix

Almandine Garnet (Fe3Al2(SiO4)3)

Mica Schist (Mica Schist (KAl2(AlSi3O10)(OH)2 - Muscovite component)) — metamorphic

Mica Schist

Mica Schist (KAl2(AlSi3O10)(OH)2 - Muscovite component)

Quartz (Rock Crystal) with minor impurities (Quartz (SiO2)) — Mineral

Quartz (Rock Crystal) with minor impurities

Quartz (SiO2)

Blue Quartz (Quartz (SiO2) with inclusions) — Mineral

Blue Quartz

Quartz (SiO2) with inclusions

Mica Schist (Mica Schist (Muscovite subclass)) — metamorphic

Mica Schist

Mica Schist (Muscovite subclass)

Mica Schist (with Muscovite mica) (Mica Schist (KAl2(AlSi3O10)(OH)2)) — metamorphic

Mica Schist (with Muscovite mica)

Mica Schist (KAl2(AlSi3O10)(OH)2)

Quartzite (Quartzite (chiefly SiO2)) — metamorphic

Quartzite

Quartzite (chiefly SiO2)

White Marble (Recrystallized Calcite (CaCO3)) — metamorphic

White Marble

Recrystallized Calcite (CaCO3)

Marble (Recrystallized Calcite (CaCO3) or Dolomite (CaMg(CO3)2)) — metamorphic

Marble

Recrystallized Calcite (CaCO3) or Dolomite (CaMg(CO3)2)

Magnetite (potentially as a Lodestone or within Ironstone) (Magnetite (Fe3O4)) — mineral

Magnetite (potentially as a Lodestone or within Ironstone)

Magnetite (Fe3O4)

Greenschist / Migmatite (Regional Metamorphic Complex (Facies: Greenschist to Amphibolite)) — metamorphic

Greenschist / Migmatite

Regional Metamorphic Complex (Facies: Greenschist to Amphibolite)

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

Gneiss

Gneiss (High-grade Metamorphic Rock)

Epidote-bearing Granite (Unakite-like) (Epidotized Granite) — igneous

Epidote-bearing Granite (Unakite-like)

Epidotized Granite

Epidote (or Epidote-rich rock) (Epidote. Mineral formula: Ca2(Al,Fe)3(SiO4)3(OH).) — Mineral, often found in metamorphic rocks but also in sedimentary and igneous rocks

Epidote (or Epidote-rich rock)

Epidote. Mineral formula: Ca2(Al,Fe)3(SiO4)3(OH).

Mineral, often found in metamorphic rocks but also in sedimentary and igneous rocks

Garnet Schist (Garnetiferous Micaceous Schist) — metamorphic

Garnet Schist

Garnetiferous Micaceous Schist

Jasper Conglomerate (Puddingstone) (Siliceous Conglomerate (Quartz and Jasper clasts in a fine-grained matrix)) — sedimentary

Jasper Conglomerate (Puddingstone)

Siliceous Conglomerate (Quartz and Jasper clasts in a fine-grained matrix)

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

Quartz (Druzy)

Silicon Dioxide (SiO2)

Anthracite Coal (Anthracite (Carbon-based organic sedimentary/metamorphic rock)) — metamorphic

Anthracite Coal

Anthracite (Carbon-based organic sedimentary/metamorphic rock)