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

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Quartz Druzy (on Calcedony/Quartz base) (Silicon Dioxide (SiO2)) — mineral

Quartz Druzy (on Calcedony/Quartz base)

Silicon Dioxide (SiO2)

Quartz on Host Rock (Silicon Dioxide (SiO2)) — Mineral Specimen

Quartz on Host Rock

Silicon Dioxide (SiO2)

Mineral Specimen

Polished blue-gray stone, likely labradorite or gneiss (Labradorite-bearing gneiss; plagioclase feldspar-rich rock) — metamorphic

Polished blue-gray stone, likely labradorite or gneiss

Labradorite-bearing gneiss; plagioclase feldspar-rich rock

Banded gneiss (Foliated silicate rock, typically quartz–feldspar–mica gneiss) — metamorphic

Banded gneiss

Foliated silicate rock, typically quartz–feldspar–mica gneiss

Banded gneiss (likely amphibolite-rich gneiss) (Banded gneiss; composition commonly quartz, feldspar, mica and/or amphibole) — metamorphic

Banded gneiss (likely amphibolite-rich gneiss)

Banded gneiss; composition commonly quartz, feldspar, mica and/or amphibole

Fluorite in Matrix (Calcium Fluoride (CaF2) with Quartz/Calcite matrix) — mineral

Fluorite in Matrix

Calcium Fluoride (CaF2) with Quartz/Calcite matrix

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

Gneiss

Gneiss (High-grade metamorphic rock)

Gneiss (High-grade Metamorphic Gneiss) — metamorphic

Gneiss

High-grade Metamorphic Gneiss

Felsic Drill Core (likely Gneiss or Granite)

Felsic Metamorphic Rock (Gneissic profile)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Dendritic Agate (Silicon Dioxide (SiO2) with manganese/iron inclusions) — mineral

Dendritic Agate

Silicon Dioxide (SiO2) with manganese/iron inclusions

Banded Agate (Agatized Geode Slice) (Silicon Dioxide (SiO₂)) — mineral

Banded Agate (Agatized Geode Slice)

Silicon Dioxide (SiO₂)

Gneiss (Foliated Metamorphic Rock) — metamorphic

Gneiss

Foliated Metamorphic Rock

Gneiss (Banded Gneiss) (Gneiss) — metamorphic

Gneiss (Banded Gneiss)

Gneiss

Gneiss (Metamorphic Gneiss (High-grade regional metamorphism)) — metamorphic

Gneiss

Metamorphic Gneiss (High-grade regional metamorphism)

Turquoise (Turquoise - CuAl6(PO4)4(OH)8·4H2O) — mineral

Turquoise

Turquoise - CuAl6(PO4)4(OH)8·4H2O

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

Banded Gneiss

Gneiss (High-grade regional metamorphic rock)

Pyritic Gneiss (Metamorphic Gneiss with Pyrite inclusions) — metamorphic

Pyritic Gneiss

Metamorphic Gneiss with Pyrite inclusions

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

Chalcedony (Botryoidal)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Banded Gneiss (Gneiss) — metamorphic

Banded Gneiss

Gneiss

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

Gneiss

Gneiss (High-grade Metamorphic Rock)

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

Clear Quartz (Druzy)

Crystalline Silicon Dioxide (SiO2)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Quartz Geode (Silicon Dioxide (SiO2)) — mineral

Quartz Geode

Silicon Dioxide (SiO2)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Carnelian (Tumbled) (Carnelian (Chalcedony / Silicon Dioxide, SiO2)) — mineral

Carnelian (Tumbled)

Carnelian (Chalcedony / Silicon Dioxide, SiO2)

Banded gneiss (likely garnet-biotite or quartz-feldspar gneiss) (Gneiss; predominantly quartz (SiO₂), feldspar, and dark biotite/amphibole) — metamorphic

Banded gneiss (likely garnet-biotite or quartz-feldspar gneiss)

Gneiss; predominantly quartz (SiO₂), feldspar, and dark biotite/amphibole

Banded gneiss (Gneiss, commonly quartz–feldspar–biotite gneiss) — metamorphic

Banded gneiss

Gneiss, commonly quartz–feldspar–biotite gneiss

Gray foliated metamorphic rock, likely gneiss or schist (Quartz–feldspar–mica metamorphic rock; exact identification requires a fresh surface and testing) — metamorphic

Gray foliated metamorphic rock, likely gneiss or schist

Quartz–feldspar–mica metamorphic rock; exact identification requires a fresh surface and testing

Banded gneiss (Gneiss, commonly quartz–feldspar–biotite gneiss) — metamorphic

Banded gneiss

Gneiss, commonly quartz–feldspar–biotite gneiss

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

Feldspathic Gneiss

High-grade Metamorphic Rock (Gneiss)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Gneiss (Gneiss (Metamorphic rock dominated by Quartz, Feldspar, and various dark minerals)) — metamorphic

Gneiss

Gneiss (Metamorphic rock dominated by Quartz, Feldspar, and various dark minerals)

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

Gneiss

High-grade metamorphic rock (Gneiss)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Gneiss (foliated metamorphic rock) (Gneiss) — metamorphic

Gneiss (foliated metamorphic rock)

Gneiss

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

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

Banded Gneiss

Gneiss (High-grade Metamorphic Rock)

Gneiss (with Mica and Quartz) (Gneissic Metamorphic Rock) — metamorphic

Gneiss (with Mica and Quartz)

Gneissic Metamorphic Rock

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

Banded Gneiss

Gneiss (High-grade regional metamorphic rock)