Rock Identifier

Category

Igneous And Sedimentary

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

Learn about Igneous And Sedimentary in the encyclopedia

Carbonatite

Conglomerate

Quartzite Sandstone

Quartzite Sandstone

Breccia

Ironstone

Lamproite

Troctolite

Basalt

Gabbro

Kimberlite

Diorite

Coal

Concrete or asphalt-like aggregate surface with a dark fragment (Uncertain; likely artificial concrete containing mixed lithic aggregate, not a natural rock) — sedimentary

Concrete or asphalt-like aggregate surface with a dark fragment

Uncertain; likely artificial concrete containing mixed lithic aggregate, not a natural rock

Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

Agate Geode with Quartz Druzy (Cryptocrystalline Quartz (SiO2)) — sedimentary

Agate Geode with Quartz Druzy

Cryptocrystalline Quartz (SiO2)

Biotite-rich gneiss or schist (Mica gneiss/schist; primarily quartz, feldspar, biotite, and possibly amphibole) — metamorphic

Biotite-rich gneiss or schist

Mica gneiss/schist; primarily quartz, feldspar, biotite, and possibly amphibole

Gneissic River Cobble (Gneiss) — metamorphic

Gneissic River Cobble

Gneiss

Gneiss (Orthogneiss / Paragneiss) — metamorphic

Gneiss

Orthogneiss / Paragneiss

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

Gneiss

Gneiss (High-grade metamorphic rock)

Banded Gneiss (Gneiss (Metamorphic Rock)) — metamorphic

Banded Gneiss

Gneiss (Metamorphic Rock)

Gneiss (specifically a Hornblende Gneiss or Micaceous Gneiss) (Gneiss (metamorphic rock composed primarily of quartz, feldspar, and mafic minerals)) — metamorphic

Gneiss (specifically a Hornblende Gneiss or Micaceous Gneiss)

Gneiss (metamorphic rock composed primarily of quartz, feldspar, and mafic minerals)

Chalcedony (Agate) (Cryptocrystalline Quartz (SiO2)) — mineral

Chalcedony (Agate)

Cryptocrystalline Quartz (SiO2)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Gneiss (with Quartzite and Mica) (Gneiss) — metamorphic

Gneiss (with Quartzite and Mica)

Gneiss

Gneiss (Pebble) (Gneiss) — metamorphic

Gneiss (Pebble)

Gneiss

Gneiss (with iron staining) (Gneiss) — metamorphic

Gneiss (with iron staining)

Gneiss

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

Gneiss

High-grade regional metamorphic rock (Foliated)

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

Banded Gneiss

Gneiss (High-grade Metamorphic Rock)

Gneiss (Gneiss (High-grade Regional Metamorphism)) — metamorphic

Gneiss

Gneiss (High-grade Regional Metamorphism)

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

Banded Gneiss

Gneiss (high-grade metamorphic silicate rock)

Banded metamorphic rock, likely gneiss (Biotite–quartz–feldspar gneiss, possibly migmatitic) — metamorphic

Banded metamorphic rock, likely gneiss

Biotite–quartz–feldspar gneiss, possibly migmatitic

Chalcedony (Agate Pebble) (Microcrystalline Quartz (SiO2)) — sedimentary

Chalcedony (Agate Pebble)

Microcrystalline Quartz (SiO2)

Likely weathered gneiss (Banded quartz–feldspar–mica gneiss) — metamorphic

Likely weathered gneiss

Banded quartz–feldspar–mica gneiss

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

Gneiss

Gneiss (High-grade Metamorphic Rock)

Weathered iron-rich rock, possibly limonite-bearing basalt or ironstone (Undetermined; likely iron oxides/hydroxides (goethite–hematite–limonite) in a silicate host) — mineral

Weathered iron-rich rock, possibly limonite-bearing basalt or ironstone

Undetermined; likely iron oxides/hydroxides (goethite–hematite–limonite) in a silicate host

Banded gneiss pebble (Gneiss, composed chiefly of quartz, feldspar, and mica/amphibole) — metamorphic

Banded gneiss pebble

Gneiss, composed chiefly of quartz, feldspar, and mica/amphibole

Banded Gneiss (Gneiss (Metamorphic Rock)) — metamorphic

Banded Gneiss

Gneiss (Metamorphic Rock)

Quartz Drusy (on Geode Fragment) (Crystalline Silicon Dioxide (SiO2)) — mineral

Quartz Drusy (on Geode Fragment)

Crystalline Silicon Dioxide (SiO2)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Gneiss (High-grade foliated metamorphic rock) — metamorphic

Gneiss

High-grade foliated metamorphic rock

Gneiss with Quartz Vein (Metamorphic Gneiss) — metamorphic

Gneiss with Quartz Vein

Metamorphic Gneiss

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

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

Gneiss

Gneiss (High-grade metamorphic rock)

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

River Rock (Gneiss/Schist mix)

Foliated Metamorphic Rock (Gneiss)

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

Gneiss

Gneiss (High-grade metamorphic rock)

Gneiss (with Quartzite layers) (Gneissic Metamorphic Rock) — metamorphic

Gneiss (with Quartzite layers)

Gneissic Metamorphic Rock

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

Banded Gneiss

Gneiss (High-grade metamorphic rock)

Gneiss with Quartz/Feldspar Vein (Quartz-Feldspathic Gneiss) — metamorphic

Gneiss with Quartz/Feldspar Vein

Quartz-Feldspathic Gneiss

Gneiss (Banded Gneiss) (Gneiss) — metamorphic

Gneiss (Banded Gneiss)

Gneiss

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Botryoidal Agate (Chalcedony (Silicon Dioxide, SiO2)) — mineral

Botryoidal Agate

Chalcedony (Silicon Dioxide, SiO2)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

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

Clear Quartz Geode

Crystalline Silicon Dioxide (SiO2)

Banded gneiss pebble (Gneiss, typically quartz–feldspar–mica assemblage) — metamorphic

Banded gneiss pebble

Gneiss, typically quartz–feldspar–mica assemblage