Rock Identifier

Category

Igneous And Sedimentary Mixture

Browse igneous and sedimentary mixture specimens identified by the Rock Identifier community.

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

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

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Gneiss (Metamorphic Rock) (Gneiss) — metamorphic

Gneiss (Metamorphic Rock)

Gneiss

Gneiss (Gneissic Metamorphic Rock) — metamorphic

Gneiss

Gneissic Metamorphic Rock

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Pink Calcite (Mangano Calcite) (Calcium Carbonate (CaCO3)) — mineral

Pink Calcite (Mangano Calcite)

Calcium Carbonate (CaCO3)

Pyrite (on the right) and Magnetite or Hematite (on the left) (Iron Sulfide (FeS2) and Iron Oxide (Fe3O4 or Fe2O3)) — mineral

Pyrite (on the right) and Magnetite or Hematite (on the left)

Iron Sulfide (FeS2) and Iron Oxide (Fe3O4 or Fe2O3)

Quartz (Peach/Orange variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Peach/Orange variety)

Silicon Dioxide (SiO2)

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

Gneiss (specifically Granite Gneiss)

Gneiss (High-grade Regional Metamorphic Rock)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

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

Clear Quartz Crystal Cluster

Silicon Dioxide (SiO2)

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

Gneiss

High-grade metamorphic rock (Gneiss)

Carnelian Agate (Carnelian (Silicon Dioxide - SiO2)) — mineral

Carnelian Agate

Carnelian (Silicon Dioxide - SiO2)

Biotite (Black Mica) (Biotite - K(Mg,Fe)3AlSi3O10(F,OH)2) — mineral

Biotite (Black Mica)

Biotite - K(Mg,Fe)3AlSi3O10(F,OH)2

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

Hematite

Iron(III) oxide (Fe2O3)

Calcite (Calcium Carbonate (CaCO3)) — mineral

Calcite

Calcium Carbonate (CaCO3)

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

Gneiss

Gneiss (High-grade Metamorphic Rock)

Sandstone (Arenite (predominantly SiO2)) — sedimentary

Sandstone

Arenite (predominantly SiO2)

Citrine Quartz (SiO2 (Silicon Dioxide with Iron impurities)) — mineral

Citrine Quartz

SiO2 (Silicon Dioxide with Iron impurities)

Native Gold (in Jewelry) (Gold (Au)) — mineral

Native Gold (in Jewelry)

Gold (Au)

Blue Chalcedony (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — mineral

Blue Chalcedony

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Tumbled Moonstone (Feldspar (Orthoclase/Albite), KAlSi3O8) — mineral

Tumbled Moonstone

Feldspar (Orthoclase/Albite), KAlSi3O8

Black Tourmaline (Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)) — mineral

Black Tourmaline

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

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Lavender Quartz (appearing as beads) and Druzy Quartz (Silicon Dioxide (SiO2)) — mineral

Lavender Quartz (appearing as beads) and Druzy Quartz

Silicon Dioxide (SiO2)

Carnelian (Chalcedony (SiO2)) — mineral

Carnelian

Chalcedony (SiO2)

Sandstone (Yellow/Tan Sandstone) (Arenite (primarily Quartz, SiO2)) — sedimentary

Sandstone (Yellow/Tan Sandstone)

Arenite (primarily Quartz, SiO2)

Chert (Flint) (Chert (Microcrystalline Quartz, SiO2)) — sedimentary

Chert (Flint)

Chert (Microcrystalline Quartz, SiO2)

Water and Silt (Sedimentary Environment) (Suspended Sediment / H2O (dihydrogen monoxide)) — sedimentary

Water and Silt (Sedimentary Environment)

Suspended Sediment / H2O (dihydrogen monoxide)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz (likely Rose Quartz or Milky Quartz based on color) (Quartz (SiO2 - Silicon Dioxide)) — Mineral

Quartz (likely Rose Quartz or Milky Quartz based on color)

Quartz (SiO2 - Silicon Dioxide)

Banded Agate (specifically Sardonyx or Carnelian Agate) (Silicon Dioxide (SiO2) - Chalcedony variety) — mineral

Banded Agate (specifically Sardonyx or Carnelian Agate)

Silicon Dioxide (SiO2) - Chalcedony variety

Quartz Geode (Silicon Dioxide (SiO2)) — mineral

Quartz Geode

Silicon Dioxide (SiO2)

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

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Quartz Geode (Quartz (Silicon Dioxide, SiO2)) — Mineral

Quartz Geode

Quartz (Silicon Dioxide, SiO2)

Almandine Garnet (Almandine (Fe3Al2(SiO4)3)) — mineral

Almandine Garnet

Almandine (Fe3Al2(SiO4)3)

Almandine Garnet (Almandite (Fe3Al2(SiO4)3)) — Mineral

Almandine Garnet

Almandite (Fe3Al2(SiO4)3)

Green Calcite (Calcium Carbonate (CaCO3)) — mineral

Green Calcite

Calcium Carbonate (CaCO3)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Gneiss (Metamorphic Rock) (Gneiss (high-grade regional metamorphic rock)) — metamorphic

Gneiss (Metamorphic Rock)

Gneiss (high-grade regional metamorphic rock)

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)