Rock Identifier

Category

Sedimentary And Igneous

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

Learn about Sedimentary And Igneous in the encyclopedia

Carbonatite

Conglomerate

Quartzite Sandstone

Quartzite Sandstone

Breccia

Ironstone

Lamproite

Troctolite

Basalt

Gabbro

Kimberlite

Diorite

Coal

Granite (Granite (a plutonic igneous rock)) — Igneous

Granite

Granite (a plutonic igneous rock)

Knightia Fossil in Limestone (Knightia eocaena in micritic limestone) — sedimentary

Knightia Fossil in Limestone

Knightia eocaena in micritic limestone

Puddingstone (Gowganda) (Gowganda Formation Conglomerate) — sedimentary

Puddingstone (Gowganda)

Gowganda Formation Conglomerate

Obsidian (Volcanic Glass) — igneous

Obsidian

Volcanic Glass

Granite (Granite) — igneous

Granite

Granite

Pink Feldspar (Orthoclase (KAlSi3O8)) — igneous

Pink Feldspar

Orthoclase (KAlSi3O8)

Olivine in Basalt matrix (Peridotite (Mg, Fe)2SiO4) — igneous

Olivine in Basalt matrix

Peridotite (Mg, Fe)2SiO4

Limonite Geode (Ironstone Concretion) (Limonite [FeO(OH)·nH2O] with possible Quartz or Calcite interior) — sedimentary

Limonite Geode (Ironstone Concretion)

Limonite [FeO(OH)·nH2O] with possible Quartz or Calcite interior

Agate (SiO2) — mineral

Agate

SiO2

Devil's Toenail (Gryphaea (extinct genus of foam oysters, typically composed of Calcite CaCO3)) — sedimentary

Devil's Toenail

Gryphaea (extinct genus of foam oysters, typically composed of Calcite CaCO3)

Chert (Common Opal/Chalcedony variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Common Opal/Chalcedony variety)

Microcrystalline Quartz (SiO2)

Granite (Granite) — igneous

Granite

Granite

Granite (Phaneritic Plutonic Igneous Rock (primarily composed of quartz, alkali feldspar, and plagioclase)) — igneous

Granite

Phaneritic Plutonic Igneous Rock (primarily composed of quartz, alkali feldspar, and plagioclase)

Granite (Phaneritic Granitoid) — igneous

Granite

Phaneritic Granitoid

Quartz Geode in Sedimentary Host Rock (Silicon Dioxide (SiO2) in Carbonate Matrix) — sedimentary

Quartz Geode in Sedimentary Host Rock

Silicon Dioxide (SiO2) in Carbonate Matrix

Coquina / Shelly Sandstone (Calcareous Sandstone / Coquina) — sedimentary

Coquina / Shelly Sandstone

Calcareous Sandstone / Coquina

Conglomerate (Conglomerate (Sedimentary Rock)) — sedimentary

Conglomerate

Conglomerate (Sedimentary Rock)

Granite (Granite (a felsic intrusive igneous rock)) — Igneous

Granite

Granite (a felsic intrusive igneous rock)

Fossiliferous Limestone with Brachiopod (Phylum Brachiopoda in calcitic matrix) — sedimentary

Fossiliferous Limestone with Brachiopod

Phylum Brachiopoda in calcitic matrix

Lepidodendron Fossil in Sandstone (Lepidodendron (Lycophytina, Lepidodendrales)) — sedimentary

Lepidodendron Fossil in Sandstone

Lepidodendron (Lycophytina, Lepidodendrales)

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Fossiliferous Sandstone (with Quartz patch) (Sedimentary Sandstone with Silicified Shell Fragments) — sedimentary

Fossiliferous Sandstone (with Quartz patch)

Sedimentary Sandstone with Silicified Shell Fragments

Moqui Marble (Concretion) (Iron Oxide Concretion (Hematite-cemented Sandstone)) — sedimentary

Moqui Marble (Concretion)

Iron Oxide Concretion (Hematite-cemented Sandstone)

Quartz Pebble (with Feldspar/Mica) (Granitic Quartz / SiO2 with KAlSi3O8) — igneous

Quartz Pebble (with Feldspar/Mica)

Granitic Quartz / SiO2 with KAlSi3O8

Olivine Weathered Rock (Dunite) (Dunite ((Mg, Fe)2SiO4)) — igneous

Olivine Weathered Rock (Dunite)

Dunite ((Mg, Fe)2SiO4)

Magnetite / Iron-Rich Basalt (Magnetite bearing Mafic Rock (Fe3O4)) — igneous

Magnetite / Iron-Rich Basalt

Magnetite bearing Mafic Rock (Fe3O4)

Basalt (Basalt) — igneous

Basalt

Basalt

Granite (Granite (Felsic Plutonic Rock)) — igneous

Granite

Granite (Felsic Plutonic Rock)

Pink Tourmaline in Quartz (Elbaite [Na(Li,Al)3Al6(BO3)3Si6O18(OH)4] in Quartz [SiO2]) — igneous

Pink Tourmaline in Quartz

Elbaite [Na(Li,Al)3Al6(BO3)3Si6O18(OH)4] in Quartz [SiO2]

Granite (Granite (a plutonic igneous rock)) — Igneous

Granite

Granite (a plutonic igneous rock)

Granite (Granite (a common rock type, not a single mineral; composed primarily of Quartz, Feldspar (Orthoclase and Plagioclase), and Mica (Biotite and/or Muscovite) and/or Amphibole)) — Igneous

Granite

Granite (a common rock type, not a single mineral; composed primarily of Quartz, Feldspar (Orthoclase and Plagioclase), and Mica (Biotite and/or Muscovite) and/or Amphibole)

Granite (Granite) — igneous

Granite

Granite

Red Jasper (Silicon Dioxide (SiO2) with Iron impurities) — mineral

Red Jasper

Silicon Dioxide (SiO2) with Iron impurities

Greenstone (River Pebble) (Metabasalt / Greenschist) — metamorphic

Greenstone (River Pebble)

Metabasalt / Greenschist

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

Cloud Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Raw Citrine (Citrine (Silicon Dioxide - SiO2)) — mineral

Raw Citrine

Citrine (Silicon Dioxide - SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Cloudy Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz Vein (Iron-stained) (Silicon Dioxide (SiO2) with limonite/hematite staining) — mineral

Quartz Vein (Iron-stained)

Silicon Dioxide (SiO2) with limonite/hematite staining

Citrine Quartz Geode (Silicon Dioxide (SiO2) with iron impurities) — mineral

Citrine Quartz Geode

Silicon Dioxide (SiO2) with iron impurities

Diopside (likely Chromian Diopside) (Diopside, part of Clinopyroxene family of inosilicates. Chemical formula: CaMgSi2O6. The green variety is often Chromian Diopside due to chromium impurities.) — mineral

Diopside (likely Chromian Diopside)

Diopside, part of Clinopyroxene family of inosilicates. Chemical formula: CaMgSi2O6. The green variety is often Chromian Diopside due to chromium impurities.

Sandstone Pebble (Quartz Sandstone) — sedimentary

Sandstone Pebble

Quartz Sandstone