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

Serpentinite (Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4) — metamorphic

Serpentinite

Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4

Serpentinite (Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4) — metamorphic

Serpentinite

Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4

Green Aventurine (Silicon Dioxide (SiO2 with Fuchsite inclusions)) — metamorphic

Green Aventurine

Silicon Dioxide (SiO2 with Fuchsite inclusions)

Weathered gray metamorphic rock, likely phyllite or slate (Micaceous quartz–phyllosilicate rock; commonly quartz + muscovite/illite ± chlorite) — metamorphic

Weathered gray metamorphic rock, likely phyllite or slate

Micaceous quartz–phyllosilicate rock; commonly quartz + muscovite/illite ± chlorite

Quartz-veined metamorphic rock, likely greenschist or altered basalt (Chlorite–actinolite schist or metabasalt with a milky quartz vein) — metamorphic

Quartz-veined metamorphic rock, likely greenschist or altered basalt

Chlorite–actinolite schist or metabasalt with a milky quartz vein

Weathered quartz-rich metamorphic rock, likely quartzite (Quartzite; predominantly microcrystalline quartz (SiO₂), with possible feldspar, mica, and iron-oxide staining) — metamorphic

Weathered quartz-rich metamorphic rock, likely quartzite

Quartzite; predominantly microcrystalline quartz (SiO₂), with possible feldspar, mica, and iron-oxide staining

Weathered quartz-rich metamorphic rock (probable quartzite) (Quartzite; predominantly microcrystalline quartz (SiO₂), with possible mica, feldspar, and iron-oxide impurities) — metamorphic

Weathered quartz-rich metamorphic rock (probable quartzite)

Quartzite; predominantly microcrystalline quartz (SiO₂), with possible mica, feldspar, and iron-oxide impurities

Quartz–mica metamorphic rock, likely schist (Quartz–muscovite/biotite schist; predominantly SiO₂ quartz with phyllosilicate micas) — metamorphic

Quartz–mica metamorphic rock, likely schist

Quartz–muscovite/biotite schist; predominantly SiO₂ quartz with phyllosilicate micas

Serpentinized ultramafic rock (likely serpentinite) (Serpentinite; chiefly serpentine-group minerals, Mg₃Si₂O₅(OH)₄, with possible magnetite, olivine, pyroxene, and sulfides) — metamorphic

Serpentinized ultramafic rock (likely serpentinite)

Serpentinite; chiefly serpentine-group minerals, Mg₃Si₂O₅(OH)₄, with possible magnetite, olivine, pyroxene, and sulfides

Quartzite (River Cobble) (Metamorphic Quartzite (SiO2)) — metamorphic

Quartzite (River Cobble)

Metamorphic Quartzite (SiO2)

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

Gneiss

Gneiss (High-grade metamorphic rock)

Serpentine (Serpentine subgroup (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4) — metamorphic

Serpentine

Serpentine subgroup (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4

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

Biotite Schist

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

Serpentine (Serpentine group ((Mg, Fe)3Si2O5(OH)4)) — metamorphic

Serpentine

Serpentine group ((Mg, Fe)3Si2O5(OH)4)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Marble (Marble (metamorphosed limestone or dolostone), primarily composed of calcite (CaCO3) or dolomite (CaMg(CO3)2)) — metamorphic

Marble

Marble (metamorphosed limestone or dolostone), primarily composed of calcite (CaCO3) or dolomite (CaMg(CO3)2)

Serpentine (Antigorite/Lizardite (Mg,Fe)3Si2O5(OH)4) — metamorphic

Serpentine

Antigorite/Lizardite (Mg,Fe)3Si2O5(OH)4

Diamond (Diamond (pure Carbon, C)) — mineral

Diamond

Diamond (pure Carbon, C)

Serpentine (Serpentine Group (Mg3Si2O5(OH)4)) — metamorphic

Serpentine

Serpentine Group (Mg3Si2O5(OH)4)

Tiger Diamond / Hematite-infused Quartzite (Silicified Hematite-Rich Quartzite (SiO2 + Fe2O3)) — metamorphic

Tiger Diamond / Hematite-infused Quartzite

Silicified Hematite-Rich Quartzite (SiO2 + Fe2O3)

Serpentinite (Serpentinite (composed primarily of Serpentine group minerals, Mg3Si2O5(OH)4)) — metamorphic

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals, Mg3Si2O5(OH)4)

Gravel / Small Pebble (Rock Fragment (Gravel)) — sedimentary

Gravel / Small Pebble

Rock Fragment (Gravel)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Serpentinite (Serpentinite (composed primarily of mineral group (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4)) — metamorphic

Serpentinite

Serpentinite (composed primarily of mineral group (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4)

Quartzite Cobble (Iron-stained) (Quartzite (SiO2)) — metamorphic

Quartzite Cobble (Iron-stained)

Quartzite (SiO2)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Petrified Wood (Silicified Wood (SiO2)) — metamorphic

Petrified Wood

Silicified Wood (SiO2)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

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

Lapis Lazuli

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

Unakite (Epidotized Granite) — metamorphic

Unakite

Epidotized Granite

Green Aventurine (Quartz with Fuchsine inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)) — mineral

Green Aventurine

Quartz with Fuchsine inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)

Serpentine (Serpentine group ((Mg,Fe,Ni,Al,Zn,Mn)3(Si,Al)2O5(OH)4)) — metamorphic

Serpentine

Serpentine group ((Mg,Fe,Ni,Al,Zn,Mn)3(Si,Al)2O5(OH)4)

Quartz crystal cluster (Quartz (silicon dioxide, SiO₂)) — mineral

Quartz crystal cluster

Quartz (silicon dioxide, SiO₂)

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Sunstone (Oligoclase (Plagioclase Feldspar subclass), (Ca,Na)(Al,Si)4O8) — mineral

Sunstone

Oligoclase (Plagioclase Feldspar subclass), (Ca,Na)(Al,Si)4O8

Seraphinite (Clinochlore) (Clinochlore (Mg,Fe2+)5Al(Si3Al)O10(OH)8) — mineral

Seraphinite (Clinochlore)

Clinochlore (Mg,Fe2+)5Al(Si3Al)O10(OH)8

Sapphire (Corundum (Al2O3) with traces of Iron and Titanium) — gemstone

Sapphire

Corundum (Al2O3) with traces of Iron and Titanium

Green Aventurine (Silicon Dioxide (SiO2) with Fuchsite inclusions) — metamorphic

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Anthracite Coal (Anthracite (Carbon rank grade)) — sedimentary

Anthracite Coal

Anthracite (Carbon rank grade)

Red Garnet Gemstone (Pyrope-Almandine Garnet (Mg3Al2(SiO4)3 to Fe3Al2(SiO4)3)) — gemstone

Red Garnet Gemstone

Pyrope-Almandine Garnet (Mg3Al2(SiO4)3 to Fe3Al2(SiO4)3)

Quartz Pebble (Silicon Dioxide (SiO2) Pebble) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2) Pebble

Fuchsite Quartzite (Green Aventurine in raw form) (Metamorphic Quartzite (SiO2) with Mariposite/Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)) — metamorphic

Fuchsite Quartzite (Green Aventurine in raw form)

Metamorphic Quartzite (SiO2) with Mariposite/Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)