Rock Identifier

Category

Mineral And Metamorphic Rock

Browse mineral and metamorphic rock specimens identified by the Rock Identifier community.

Learn about Mineral And Metamorphic Rock in the encyclopedia

Rock Salt

Calc-Silicate Rock

Calc-Silicate Rock

Talc-carbonate Rock

Talc-carbonate Rock

Eulysite

Hornfels

Metabasalt

Halite

Metagabbro

Metarhyolite

Cordierite Hornfels

Cordierite Hornfels

Dolomite

Gypsum

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Schist (Crystalline Metamorphic Rock (Schistose)) — metamorphic

Schist

Crystalline Metamorphic Rock (Schistose)

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

Milky Quartz

Quartz / Silicon Dioxide (SiO2)

Quartzite River Rock (Quartzite (primarily SiO2)) — metamorphic

Quartzite River Rock

Quartzite (primarily SiO2)

Banded metamorphic rock, likely gneiss (Biotite–quartz–feldspar gneiss, possibly amphibolite-bearing) — metamorphic

Banded metamorphic rock, likely gneiss

Biotite–quartz–feldspar gneiss, possibly amphibolite-bearing

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

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

Gneiss

Gneiss (High-grade metamorphic rock)

Garnet Schist (Almandine Garnet (Fe3Al2(SiO4)3) in Mica Schist) — metamorphic

Garnet Schist

Almandine Garnet (Fe3Al2(SiO4)3) in Mica Schist

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Marble (Metamorphic rock composed of Recrystallized Carbonate Minerals (chiefly CaCO3)) — metamorphic

Marble

Metamorphic rock composed of Recrystallized Carbonate Minerals (chiefly CaCO3)

Black-and-white gneiss (Gneiss, chiefly quartz–feldspar with dark biotite/amphibole bands) — metamorphic

Black-and-white gneiss

Gneiss, chiefly quartz–feldspar with dark biotite/amphibole bands

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Mica Schist (Metamorphic rock dominated by mica minerals) — metamorphic

Mica Schist

Metamorphic rock dominated by mica minerals

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

Gneiss

Gneiss (High-grade metamorphic rock)

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

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Biotite Schist (Biotite Schist (Rich in K(Mg,Fe)3AlSi3O10(OH)2)) — metamorphic

Biotite Schist

Biotite Schist (Rich in K(Mg,Fe)3AlSi3O10(OH)2)

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

Gneiss

Gneiss (High-grade metamorphic rock)

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

Banded Agate

Chalcedony / Silicon Dioxide (SiO2)

Waterworn Pebble / Quartzite (Metamorphic/Sedimentary rock fragment) — sedimentary

Waterworn Pebble / Quartzite

Metamorphic/Sedimentary rock fragment

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

Quartz (Small Fragment)

Silicon Dioxide (SiO2)

Blue Quartz (Aventurine) (Silicon Dioxide (SiO2) with inclusions of crocidolite or dumortierite) — mineral

Blue Quartz (Aventurine)

Silicon Dioxide (SiO2) with inclusions of crocidolite or dumortierite

Tiger's Eye (Pseudomorph of Quartz after Crocidolite (SiO2)) — mineral

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Green Calcite (Calcium Carbonate (CaCO3)) — mineral

Green Calcite

Calcium Carbonate (CaCO3)

Banded Gneiss (Gneiss (Metamorphic silicate rock)) — metamorphic

Banded Gneiss

Gneiss (Metamorphic silicate rock)

Gneiss (Metamorphic Gneiss) — metamorphic

Gneiss

Metamorphic Gneiss

Blue Apatite (Fluorapatite (Ca5(PO4)3F)) — mineral

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Banded sandstone pebble (Quartz-rich lithic sandstone; exact provenance and composition require testing) — sedimentary

Banded sandstone pebble

Quartz-rich lithic sandstone; exact provenance and composition require testing

Gneiss (specifically a weathered or stream-worn specimen) (Gneiss (Foliated Metamorphic Rock)) — metamorphic

Gneiss (specifically a weathered or stream-worn specimen)

Gneiss (Foliated Metamorphic Rock)

Granitic Gneiss (Gneiss (high-grade metamorphic rock)) — metamorphic

Granitic Gneiss

Gneiss (high-grade metamorphic rock)

Quartzite Geode or Crystalline Quartz Node (Silicon Dioxide (SiO2)) — metamorphic

Quartzite Geode or Crystalline Quartz Node

Silicon Dioxide (SiO2)

Slate (Slate (foliated metamorphic rock)) — metamorphic

Slate

Slate (foliated metamorphic rock)

Schist with Quartz Vein (Mica Schist with Crystalline Quartz (SiO2)) — metamorphic

Schist with Quartz Vein

Mica Schist with Crystalline Quartz (SiO2)

Gneiss (Banded orthogneiss or paragneiss, typically quartz–feldspar–mica bearing) — metamorphic

Gneiss

Banded orthogneiss or paragneiss, typically quartz–feldspar–mica bearing

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Gneiss (Gneiss (a type of metamorphic rock)) — Metamorphic Rock

Gneiss

Gneiss (a type of metamorphic rock)

Metamorphic Rock

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

Gneiss

Gneiss (High-grade metamorphic rock)

Biotite (Black Mica) (Biotite - K(Mg,Fe)3(AlSi3O10)(OH)2) — mineral

Biotite (Black Mica)

Biotite - K(Mg,Fe)3(AlSi3O10)(OH)2

Quartz Sand Grain / Micro Crystal (Silicon Dioxide (SiO2)) — mineral

Quartz Sand Grain / Micro Crystal

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Specular Hematite (Specularite (Fe2O3)) — mineral

Specular Hematite

Specularite (Fe2O3)

Weathered mica-rich metamorphic rock (Probable biotite schist or mica schist) — metamorphic

Weathered mica-rich metamorphic rock

Probable biotite schist or mica schist

Tumbled banded metamorphic stone (Likely banded gneiss or migmatitic gneiss; exact identification requires testing) — metamorphic

Tumbled banded metamorphic stone

Likely banded gneiss or migmatitic gneiss; exact identification requires testing