Rock Identifier

Category

Metamorphic Rock (Primarily Composed Of Minerals)

Browse metamorphic rock (primarily composed of minerals) specimens identified by the Rock Identifier community.

Learn about Metamorphic Rock (Primarily Composed Of Minerals) in the encyclopedia

Rock Salt

Calc-Silicate Rock

Calc-Silicate Rock

Talc-carbonate Rock

Talc-carbonate Rock

Eulysite

Metabasalt

Hornfels

Albitite

Metagabbro

Epidosite

Schist

Metarhyolite

Cordierite Hornfels

Cordierite Hornfels

Granite Pebble (Granite) — igneous

Granite Pebble

Granite

Unakite (Altered Granite (Epidotized Granite)) — metamorphic

Unakite

Altered Granite (Epidotized Granite)

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

Likely gneiss

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

Epidote (Greenstone) (Calcium aluminum iron silicate hydroxide Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH)) — metamorphic

Epidote (Greenstone)

Calcium aluminum iron silicate hydroxide Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH)

Basalt (Extrusive igneous rock primarily composed of plagioclase feldspar and pyroxene) — igneous

Basalt

Extrusive igneous rock primarily composed of plagioclase feldspar and pyroxene

Sandstone (Quartz Sandstone (predominantly)) — Sedimentary

Sandstone

Quartz Sandstone (predominantly)

Serpentinite (Serpentinite (composed largely of Serpentine minerals such as Lizardite, Antigorite, and Chrysotile: Mg3Si2O5(OH)4)) — metamorphic

Serpentinite

Serpentinite (composed largely of Serpentine minerals such as Lizardite, Antigorite, and Chrysotile: Mg3Si2O5(OH)4)

Assorted Decorative Tumbled Stones (Quartz, Sodalite, Aventurine, Calcite) (Mixed Silicates and Carbonates (SiO2, Na8(Al6Si6O24)Cl2, CaCO3)) — mineral

Assorted Decorative Tumbled Stones (Quartz, Sodalite, Aventurine, Calcite)

Mixed Silicates and Carbonates (SiO2, Na8(Al6Si6O24)Cl2, CaCO3)

Gneiss (Metamorphic Rock) (Gneiss (variable mineral formula primarily containing Quartz, Feldspar, and Mica)) — metamorphic

Gneiss (Metamorphic Rock)

Gneiss (variable mineral formula primarily containing Quartz, Feldspar, and Mica)

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

Mica Schist

Metamorphic rock dominated by mica minerals

Sandstone (Arenite (primarily SiO2 - Silicon Dioxide)) — sedimentary

Sandstone

Arenite (primarily SiO2 - Silicon Dioxide)

Gneiss (Gneissic Metamorphic Rock) — metamorphic

Gneiss

Gneissic Metamorphic Rock

Quartzite (Quartzite (composed primarily of SiO2)) — metamorphic

Quartzite

Quartzite (composed primarily of SiO2)

Red Quartzite (Quartzite (composed primarily of SiO2)) — metamorphic

Red Quartzite

Quartzite (composed primarily of SiO2)

Quartzite (Quartzite (composed primarily of SiO2)) — metamorphic

Quartzite

Quartzite (composed primarily of SiO2)

Quartzite (Quartzite (composed primarily of SiO2)) — metamorphic

Quartzite

Quartzite (composed primarily of SiO2)

Quartzite (Quartzite (composed primarily of SiO2)) — metamorphic

Quartzite

Quartzite (composed primarily of SiO2)

Quartzite Cobble (Quartzite (composed primarily of SiO2)) — metamorphic

Quartzite Cobble

Quartzite (composed primarily of SiO2)

Quartzite (Quartzite (composed primarily of SiO2)) — metamorphic

Quartzite

Quartzite (composed primarily of SiO2)

Sandstone (Ferruginous) (Arenite with Iron Oxide cement) — sedimentary

Sandstone (Ferruginous)

Arenite with Iron Oxide cement

Sandstone (Sedimentary Rock (Quartz Sandstone)) — sedimentary

Sandstone

Sedimentary Rock (Quartz Sandstone)

Green Quartzite / Aventurine (Quartzite (SiO2 with fuchsite/chlorite inclusions)) — metamorphic

Green Quartzite / Aventurine

Quartzite (SiO2 with fuchsite/chlorite inclusions)

Shale (Fissile Mudstone (primarily composed of clay minerals and quartz grains)) — sedimentary

Shale

Fissile Mudstone (primarily composed of clay minerals and quartz grains)

Agate Geode Slice with Druzy Quartz (Silicon Dioxide (SiO2) - Banded Chalcedony with Quartz) — mineral

Agate Geode Slice with Druzy Quartz

Silicon Dioxide (SiO2) - Banded Chalcedony with Quartz

Coquina (Bioclastic Limestone (CaCO3)) — sedimentary

Coquina

Bioclastic Limestone (CaCO3)

Quartzite (Metamorphic rock (primarily SiO2)) — metamorphic

Quartzite

Metamorphic rock (primarily SiO2)

Weathered gray sandstone or siltstone cobble (Clastic sedimentary rock, likely quartz-rich sandstone/siltstone (diagnosis uncertain from image)) — sedimentary

Weathered gray sandstone or siltstone cobble

Clastic sedimentary rock, likely quartz-rich sandstone/siltstone (diagnosis uncertain from image)

Sandstone (Quartzose Sandstone) (Arenite) — sedimentary

Sandstone (Quartzose Sandstone)

Arenite

Moonstone (Orthoclase Feldspar (KAlSi3O8)) — mineral

Moonstone

Orthoclase Feldspar (KAlSi3O8)

Schist (Mica Schist) — metamorphic

Schist

Mica Schist

Polished white quartz-rich pebble (Microcrystalline quartz (SiO₂), likely milky quartz or quartzite) — mineral

Polished white quartz-rich pebble

Microcrystalline quartz (SiO₂), likely milky quartz or quartzite

Yellow Agate (Silicon Dioxide (SiO2)) — mineral

Yellow Agate

Silicon Dioxide (SiO2)

Bauxite (Aluminum ore (mixture of gibbsite Al(OH)3, boehmite γ-AlO(OH), and diaspore α-AlO(OH))) — sedimentary

Bauxite

Aluminum ore (mixture of gibbsite Al(OH)3, boehmite γ-AlO(OH), and diaspore α-AlO(OH))

Bauxite (Bauxite (Mixture of Al(OH)3, AlO(OH), and Fe2O3)) — sedimentary

Bauxite

Bauxite (Mixture of Al(OH)3, AlO(OH), and Fe2O3)

Quartzite Pebble (Metamorphic rock predominantly composed of Quartz (SiO2)) — metamorphic

Quartzite Pebble

Metamorphic rock predominantly composed of Quartz (SiO2)

Veined quartz-bearing metamorphic rock (Likely quartzite or siliceous schist with iron-oxide staining) — metamorphic

Veined quartz-bearing metamorphic rock

Likely quartzite or siliceous schist with iron-oxide staining

Red Sandstone (Arkose) (Clastic Sedimentary Rock (Lithic Arkose)) — sedimentary

Red Sandstone (Arkose)

Clastic Sedimentary Rock (Lithic Arkose)

Gneiss (Foliated Metamorphic Rock) — metamorphic

Gneiss

Foliated Metamorphic Rock

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Greenstone (Epidosite) (Epidosite (Metamorphosed Basalt/Diabase)) — metamorphic

Greenstone (Epidosite)

Epidosite (Metamorphosed Basalt/Diabase)

Granite (Granite (composed primarily of Quartz SiO2, Feldspar (KAlSi3O8), and Mica)) — igneous

Granite

Granite (composed primarily of Quartz SiO2, Feldspar (KAlSi3O8), and Mica)

Unakite (Tumbled) (Epidotized Granite) — metamorphic

Unakite (Tumbled)

Epidotized Granite