Rock Identifier

Category

Igneous Or Sedimentary (Anthropogenic Modification)

Browse igneous or sedimentary (anthropogenic modification) specimens identified by the Rock Identifier community.

Learn about Igneous Or Sedimentary (Anthropogenic Modification) in the encyclopedia

Carbonatite

Conglomerate

Quartzite Sandstone

Quartzite Sandstone

Breccia

Ironstone

Lamproite

Troctolite

Basalt

Gabbro

Kimberlite

Diorite

Coal

Gneiss (Gneiss (Metamorphic high-grade)) — metamorphic

Gneiss

Gneiss (Metamorphic high-grade)

Quartz Geode Fragment (Silicon Dioxide (SiO2)) — mineral

Quartz Geode Fragment

Silicon Dioxide (SiO2)

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

Gneiss

Gneiss (High-grade metamorphic rock)

Quartz Geode Fragment (Silicon Dioxide (SiO2)) — mineral

Quartz Geode Fragment

Silicon Dioxide (SiO2)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Quartz-rich gneiss (Foliated quartz–feldspar–mica gneiss, possibly migmatitic) — metamorphic

Quartz-rich gneiss

Foliated quartz–feldspar–mica gneiss, possibly migmatitic

Ruby in Zoisite (Anyolite (composite of Corundum Al2O3 and Zoisite Ca2Al3(SiO4)(Si2O7)O(OH))) — metamorphic

Ruby in Zoisite

Anyolite (composite of Corundum Al2O3 and Zoisite Ca2Al3(SiO4)(Si2O7)O(OH))

Quartzite Arrowhead (Archaeological Lithic) (Recrystallized Quartz (SiO2)) — metamorphic

Quartzite Arrowhead (Archaeological Lithic)

Recrystallized Quartz (SiO2)

Biotite-rich gneiss (Foliated quartz–feldspar–mica gneiss; mainly quartz, plagioclase/alkali feldspar, and biotite) — metamorphic

Biotite-rich gneiss

Foliated quartz–feldspar–mica gneiss; mainly quartz, plagioclase/alkali feldspar, and biotite

Quartz Crystal (Geode Fragment) (Silicon Dioxide (SiO2)) — mineral

Quartz Crystal (Geode Fragment)

Silicon Dioxide (SiO2)

Gneiss (Metamorphic Foliated Gneiss) — metamorphic

Gneiss

Metamorphic Foliated Gneiss

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

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

Gneiss

High-grade regional metamorphic rock (Foliated)

Banded Gneiss (Gneiss) — metamorphic

Banded Gneiss

Gneiss

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Chalcedony (Chalcedony (SiO2)) — mineral

Chalcedony

Chalcedony (SiO2)

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

Gneiss

High-grade regional metamorphic rock (Foliated Gneiss)

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

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Banded metamorphic rock, likely gneiss or migmatitic gneiss (Quartz–feldspar–mica gneiss; exact identification requires a fresh surface and mineral tests) — metamorphic

Banded metamorphic rock, likely gneiss or migmatitic gneiss

Quartz–feldspar–mica gneiss; exact identification requires a fresh surface and mineral tests

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

Gneiss

Gneiss (High-grade metamorphic rock)

Chalcedony (Agate/Carnelian) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Agate/Carnelian)

Silicon Dioxide (SiO2)

Quartz-rich weathered rock, possibly quartzite (Quartzite (mostly SiO₂); exact identification is uncertain from the image) — metamorphic

Quartz-rich weathered rock, possibly quartzite

Quartzite (mostly SiO₂); exact identification is uncertain from the image

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

Banded gneiss

Gneiss, commonly quartz–feldspar–biotite gneiss

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Slag (Anthropogenic Glass/Iron byproduct) (Ferro-silicate Slag) — Anthropogenic (Man-made)

Slag (Anthropogenic Glass/Iron byproduct)

Ferro-silicate Slag

Anthropogenic (Man-made)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Biotite-rich gneiss (possibly mica schist) (Quartz–feldspar–biotite gneiss; mica-rich metamorphic rock) — metamorphic

Biotite-rich gneiss (possibly mica schist)

Quartz–feldspar–biotite gneiss; mica-rich metamorphic rock

Foliated Gneiss (Gneiss (Metamorphic Rock)) — metamorphic

Foliated Gneiss

Gneiss (Metamorphic Rock)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Agate (Silicon dioxide (chalcedony), SiO2) — sedimentary

Agate

Silicon dioxide (chalcedony), SiO2

Agate (Silicon Dioxide (Chalcedony), SiO2) — sedimentary

Agate

Silicon Dioxide (Chalcedony), SiO2

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

Banded gneiss pebble

Gneiss, likely quartz–feldspar–mica gneiss

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Gneiss (specifically Epidote-Quartz Gneiss) (Gneiss containing Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)) and Quartz (SiO2)) — metamorphic

Gneiss (specifically Epidote-Quartz Gneiss)

Gneiss containing Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)) and Quartz (SiO2)

Banded Gneiss (Gneiss (Metamorphic Rock)) — metamorphic

Banded Gneiss

Gneiss (Metamorphic Rock)

Gneiss (High-grade Metamorphic Gneiss) — metamorphic

Gneiss

High-grade Metamorphic Gneiss

Gneiss (High-grade regional metamorphic rock) — metamorphic

Gneiss

High-grade regional metamorphic rock

Gneiss with Quartz Veining (Gneiss (High-grade Metamorphic Rock)) — metamorphic

Gneiss with Quartz Veining

Gneiss (High-grade Metamorphic Rock)

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

Gneiss Pebble

Gneiss (High-grade metamorphic rock)

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

Gneiss

Gneiss (High-grade metamorphic rock)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Chalcedony (Agate/Carnelian variety) (Cryptocrystalline Quartz (SiO2)) — mineral

Chalcedony (Agate/Carnelian variety)

Cryptocrystalline Quartz (SiO2)