Rock Identifier

Category

Igneous, Sedimentary, Metamorphic, Mineral

Browse igneous, sedimentary, metamorphic, mineral specimens identified by the Rock Identifier community.

Learn about Igneous, Sedimentary, Metamorphic, Mineral in the encyclopedia

Carbonatite

Coal

Conglomerate

Metabasalt

Cordierite Hornfels

Cordierite Hornfels

Glauconite

Quartzite Sandstone

Quartzite Sandstone

Eulysite

Migmatite

Breccia

Anthracite

Hutcheonite

Quartz (specifically Clear Quartz or Rock Crystal) (Silicon Dioxide (SiO2)) — mineral

Quartz (specifically Clear Quartz or Rock Crystal)

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Orange Calcite (Calcite (CaCO3)) — Mineral

Orange Calcite

Calcite (CaCO3)

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

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

Quartz (Milky/Common Quartz)

Silicon Dioxide (SiO2)

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

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

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Quartz (clear quartz/crystal quartz) (Quartz, silicon dioxide (SiO₂), trigonal crystal system) — mineral

Quartz (clear quartz/crystal quartz)

Quartz, silicon dioxide (SiO₂), trigonal crystal system

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

Banded Gneiss

Gneiss (High-grade regional metamorphic rock)

Gneiss (Hornblende/Biotite Gneiss) (Foliated Metamorphic Rock (Quartz-Feldspar-Amphibole/Mica matrix)) — metamorphic

Gneiss (Hornblende/Biotite Gneiss)

Foliated Metamorphic Rock (Quartz-Feldspar-Amphibole/Mica matrix)

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

Gneiss (Green Gneiss)

Gneiss (High-grade Regional Metamorphic Rock)

Banded Gneiss (Gneiss (Metamorphic Rock)) — metamorphic

Banded Gneiss

Gneiss (Metamorphic Rock)

Gneiss (Foliated Metamorphic Rock) — metamorphic

Gneiss

Foliated Metamorphic Rock

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

Gneiss (specifically Granite Gneiss)

Gneiss (High-grade Regional Metamorphic Rock)

Gneiss (with Garnet) (Gneiss (Feldspar-Quartz-Biotite-Garnet Metamorphic Rock)) — metamorphic

Gneiss (with Garnet)

Gneiss (Feldspar-Quartz-Biotite-Garnet Metamorphic Rock)

Likely weathered quartz-bearing rock (uncertain identification) (Possibly quartz-rich granite or granitic aplite; exact identification requires a clearer, larger image and tests) — igneous

Likely weathered quartz-bearing rock (uncertain identification)

Possibly quartz-rich granite or granitic aplite; exact identification requires a clearer, larger image and tests

Small rounded pebble, likely quartz-rich river stone (Indeterminate; likely quartz/chert-bearing lithic clast) — sedimentary

Small rounded pebble, likely quartz-rich river stone

Indeterminate; likely quartz/chert-bearing lithic clast

Garnet Gneiss (Gneiss containing almandine-pyrope garnet) — metamorphic

Garnet Gneiss

Gneiss containing almandine-pyrope garnet

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

Quartz (Milky Quartz / Quartzite)

Silicon Dioxide (SiO2)

Sand Grain (Silica/Quartz Grain) (Silicon Dioxide (SiO2)) — sedimentary

Sand Grain (Silica/Quartz Grain)

Silicon Dioxide (SiO2)

Gneiss (Cobble) (Gneiss) — metamorphic

Gneiss (Cobble)

Gneiss

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Pyrite (Iron Disulfide (FeS2)) — mineral

Pyrite

Iron Disulfide (FeS2)

Green Mica Schist (Mica Schist (Fuchsite or Chlorite variety)) — metamorphic

Green Mica Schist

Mica Schist (Fuchsite or Chlorite variety)

Quartz–feldspar–mica metamorphic rock, likely gneiss (Gneiss; composition commonly quartz (SiO₂), feldspars, biotite/hornblende, and minor accessory minerals) — metamorphic

Quartz–feldspar–mica metamorphic rock, likely gneiss

Gneiss; composition commonly quartz (SiO₂), feldspars, biotite/hornblende, and minor accessory minerals

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Zoisite with Rubellite (Ruby in Zoisite) (Zoisite with inclusions of Hornblende (Anyolite)) — metamorphic

Zoisite with Rubellite (Ruby in Zoisite)

Zoisite with inclusions of Hornblende (Anyolite)

Zoisite with Ruby (Anyolite (Calcium aluminum hydroxy silicate with Corundum) Ca2Al3(SiO4)3(OH)) — metamorphic

Zoisite with Ruby

Anyolite (Calcium aluminum hydroxy silicate with Corundum) Ca2Al3(SiO4)3(OH)

Pyritic Gneiss (Metamorphic Gneiss with Pyrite inclusions) — metamorphic

Pyritic Gneiss

Metamorphic Gneiss with Pyrite inclusions

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

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

Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Magnetite (Magnetite (Fe3O4)) — mineral

Magnetite

Magnetite (Fe3O4)

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

Gneiss Pebble

Gneiss (High-grade metamorphic rock)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)