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

White Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

White Quartz Pebble

Silicon Dioxide (SiO2)

Garnet-bearing gneiss (Quartz–feldspar–mica gneiss with iron-rich garnet (commonly almandine)) — metamorphic

Garnet-bearing gneiss

Quartz–feldspar–mica gneiss with iron-rich garnet (commonly almandine)

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

Gneiss

Gneiss (High-grade metamorphic rock)

Mica Schist (Schist (biotite/muscovite schist)) — metamorphic

Mica Schist

Schist (biotite/muscovite schist)

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

Granite Gneiss

Gneiss (High-grade Metamorphic Rock)

Pyrite-bearing metamorphic rock (probable schist or quartzite) (Quartz–mica schist with disseminated pyrite; approximate composition SiO₂ + phyllosilicates + FeS₂) — metamorphic

Pyrite-bearing metamorphic rock (probable schist or quartzite)

Quartz–mica schist with disseminated pyrite; approximate composition SiO₂ + phyllosilicates + FeS₂

Conical fossil shell or shell fragment (Likely a gastropod shell fragment; exact taxon indeterminate from the image) — fossil

Conical fossil shell or shell fragment

Likely a gastropod shell fragment; exact taxon indeterminate from the image

Tumbled metamorphic pebble, likely gneiss (Foliated gneiss; commonly quartz, feldspar, mica, and amphibole) — metamorphic

Tumbled metamorphic pebble, likely gneiss

Foliated gneiss; commonly quartz, feldspar, mica, and amphibole

Foliated metamorphic rock, likely biotite schist (Mica schist, chiefly quartz, feldspar, and biotite mica) — metamorphic

Foliated metamorphic rock, likely biotite schist

Mica schist, chiefly quartz, feldspar, and biotite mica

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Jasper and Epidote Breccia (Silicified Brecciated Rock with Epidote) — metamorphic

Jasper and Epidote Breccia

Silicified Brecciated Rock with Epidote

Eclipse Stone (Kabamba Jasper) (Rhyolite with Aegirine (NaFe3+Si2O6)) — metamorphic

Eclipse Stone (Kabamba Jasper)

Rhyolite with Aegirine (NaFe3+Si2O6)

Kyanite (Kyanite (Al2SiO5)) — Mineral

Kyanite

Kyanite (Al2SiO5)

Quartz Crystal (Silicon Dioxide (SiO2)) — mineral

Quartz Crystal

Silicon Dioxide (SiO2)

Epidotite (Unakite-related) (Epidote-rich rock) — metamorphic

Epidotite (Unakite-related)

Epidote-rich rock

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartz Vein / Quartz Matrix (Silicon Dioxide (SiO2)) — mineral

Quartz Vein / Quartz Matrix

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Amphibolite with Hornblende (Amphibole-rich Metamorphic Rock (Ca2(Mg,Fe)5Si8O22(OH)2)) — metamorphic

Amphibolite with Hornblende

Amphibole-rich Metamorphic Rock (Ca2(Mg,Fe)5Si8O22(OH)2)

Quartzite with Mica / Gneiss Pebble (Metamorphic Rock (Quartz-Feldspar-Mica aggregate)) — metamorphic

Quartzite with Mica / Gneiss Pebble

Metamorphic Rock (Quartz-Feldspar-Mica aggregate)

Likely biotite-bearing metamorphic rock (schist or gneiss) (Mica schist/gneiss; chiefly quartz, feldspar, and biotite mica) — metamorphic

Likely biotite-bearing metamorphic rock (schist or gneiss)

Mica schist/gneiss; chiefly quartz, feldspar, and biotite mica

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Lapis Lazuli (Lapis Lazuli (Rock composed primarily of Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Calcite, and Pyrite)) — metamorphic

Lapis Lazuli

Lapis Lazuli (Rock composed primarily of Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Calcite, and Pyrite)

Greenschist (Greenschist (Chlorite-actinolite schist)) — metamorphic

Greenschist

Greenschist (Chlorite-actinolite schist)

Decorative polished pebbles (Likely mixed quartz-rich lithologies, including quartzite, jasper, and/or basalt) — mineral

Decorative polished pebbles

Likely mixed quartz-rich lithologies, including quartzite, jasper, and/or basalt

Chrysotile Asbestos (Mg3Si2O5(OH)4) — mineral

Chrysotile Asbestos

Mg3Si2O5(OH)4

Quartzite with Garnet inclusion (Metamorphic Quartz-rich Rock) — metamorphic

Quartzite with Garnet inclusion

Metamorphic Quartz-rich Rock

Quartzite with Epidote Vein (Metamorphosed Quartz Sandstone with Hydrothermal Vein) — metamorphic

Quartzite with Epidote Vein

Metamorphosed Quartz Sandstone with Hydrothermal Vein

Epidote and Quartz in Basalt (Epidote [Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)] in Metabasalt) — metamorphic

Epidote and Quartz in Basalt

Epidote [Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)] in Metabasalt

Gneiss (Metamorphic Pebble) (Gneiss (SiO2-rich metamorphic rock)) — metamorphic

Gneiss (Metamorphic Pebble)

Gneiss (SiO2-rich metamorphic rock)

Mixed river-worn rock and mineral collection (Mostly quartz/quartzite, feldspar-bearing granitoid, chert, and mafic volcanic rocks; exact species vary by pebble) — igneous, sedimentary, metamorphic, mineral

Mixed river-worn rock and mineral collection

Mostly quartz/quartzite, feldspar-bearing granitoid, chert, and mafic volcanic rocks; exact species vary by pebble

igneous, sedimentary, metamorphic, mineral

Gneiss (Gneiss (Foliated Metamorphic Rock)) — metamorphic

Gneiss

Gneiss (Foliated Metamorphic Rock)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Gneiss (foliated metamorphic rock) (Gneiss) — metamorphic

Gneiss (foliated metamorphic rock)

Gneiss

Schist (Mica Schist) — metamorphic

Schist

Mica Schist

Quartz Vein in Host Rock (Silicon Dioxide (SiO2) vein cutting through host rock) — mineral

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) vein cutting through host rock

Amphibolite / Biotite Schist (Amphibolite (rich in Hornblende and Plagioclase feldspar)) — metamorphic

Amphibolite / Biotite Schist

Amphibolite (rich in Hornblende and Plagioclase feldspar)

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

Agate

Silicon Dioxide (Chalcedony), SiO2

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Black Tourmaline (Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)4)) — mineral

Black Tourmaline

Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)4)