Rock Identifier

Category

Mineral (Tectosilicate)

Browse mineral (tectosilicate) specimens identified by the Rock Identifier community.

Learn about Mineral (Tectosilicate) in the encyclopedia

Glauconite

Hutcheonite

Halite

Sperrylite

Baddeleyite

Anatase

Brookite

Talc

Euxenite

Eltyubyuite

Buergerite

Dolomite

Likely mica schist (Mica-rich schist, probably biotite–quartz–feldspar schist) — metamorphic

Likely mica schist

Mica-rich schist, probably biotite–quartz–feldspar schist

Weathered conglomeratic rock, likely iron-stained sandstone (Probable ferruginous, clast-bearing sandstone; exact identification requires examination of a fresh surface) — sedimentary

Weathered conglomeratic rock, likely iron-stained sandstone

Probable ferruginous, clast-bearing sandstone; exact identification requires examination of a fresh surface

Copper-bearing altered rock, likely chrysocolla-bearing quartzite or breccia (Quartz (SiO₂) with copper silicate minerals, chiefly chrysocolla [approximately (Cu,Al)₂H₂Si₂O₅(OH)₄·nH₂O], and iron oxides) — metamorphic

Copper-bearing altered rock, likely chrysocolla-bearing quartzite or breccia

Quartz (SiO₂) with copper silicate minerals, chiefly chrysocolla [approximately (Cu,Al)₂H₂Si₂O₅(OH)₄·nH₂O], and iron oxides

Granite (Intrusive Igneous Rock) — igneous

Granite

Intrusive Igneous Rock

Tumbled serpentine (likely bowenite) (Serpentine-group minerals, chiefly antigorite/lizardite; commonly Mg₃Si₂O₅(OH)₄) — metamorphic

Tumbled serpentine (likely bowenite)

Serpentine-group minerals, chiefly antigorite/lizardite; commonly Mg₃Si₂O₅(OH)₄

Hematite (likely Botryoidal or Specularite variant) (Iron(III) oxide (Fe2O3)) — mineral

Hematite (likely Botryoidal or Specularite variant)

Iron(III) oxide (Fe2O3)

Hematite (Iron(III) oxide (Fe2O3)) — mineral

Hematite

Iron(III) oxide (Fe2O3)

Hematite (Hematite (Iron(III) oxide, Fe2O3)) — mineral

Hematite

Hematite (Iron(III) oxide, Fe2O3)

Native Copper Nugget (Native Copper (Cu)) — mineral

Native Copper Nugget

Native Copper (Cu)

Geode (Calcite or Quartz) (Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3)) — sedimentary

Geode (Calcite or Quartz)

Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Blue Chalcedony (Silicon Dioxide (SiO2)) — mineral

Blue Chalcedony

Silicon Dioxide (SiO2)

Pyrite (Fool's Gold) (Iron Sulfide (FeS2)) — mineral

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Orange feldspar pebble (likely potassium feldspar) (Likely orthoclase or microcline, KAlSi₃O₈) — mineral

Orange feldspar pebble (likely potassium feldspar)

Likely orthoclase or microcline, KAlSi₃O₈

Sandstone with Secondary Mineral Encrustation (Arenite with Silica/Calcite deposits (SiO2 or CaCO3)) — sedimentary

Sandstone with Secondary Mineral Encrustation

Arenite with Silica/Calcite deposits (SiO2 or CaCO3)

Likely serpentinite (Serpentinite, composed mainly of serpentine-group minerals (e.g., antigorite, lizardite, or chrysotile)) — metamorphic

Likely serpentinite

Serpentinite, composed mainly of serpentine-group minerals (e.g., antigorite, lizardite, or chrysotile)

Kidney Stone (Urolith / Calcium Oxalate Stone) (Calcium Oxalate Monohydrate (Whewellite) / Calcium Oxalate Dihydrate (Weddellite)) — mineral

Kidney Stone (Urolith / Calcium Oxalate Stone)

Calcium Oxalate Monohydrate (Whewellite) / Calcium Oxalate Dihydrate (Weddellite)

Foliated amphibolite (likely augen or spotted amphibolite) (Amphibolite, composed chiefly of hornblende and plagioclase; exact identification requires close examination) — metamorphic

Foliated amphibolite (likely augen or spotted amphibolite)

Amphibolite, composed chiefly of hornblende and plagioclase; exact identification requires close examination

Erythrite in Cobaltite Ore (Erythrite (Co3(AsO4)2·8H2O) with Cobaltite (CoAsS)) — mineral

Erythrite in Cobaltite Ore

Erythrite (Co3(AsO4)2·8H2O) with Cobaltite (CoAsS)

Quartz-rich pegmatite (likely feldspar–quartz rock) (Granitic pegmatite; chiefly quartz (SiO₂) and feldspar, with possible mica/iron-oxide staining) — igneous

Quartz-rich pegmatite (likely feldspar–quartz rock)

Granitic pegmatite; chiefly quartz (SiO₂) and feldspar, with possible mica/iron-oxide staining

Amygdaloidal Basalt (Extrusive mafic igneous rock with amygdules) — igneous

Amygdaloidal Basalt

Extrusive mafic igneous rock with amygdules

Weathered granite boulder (Granite, a quartz–feldspar-rich intrusive igneous rock) — igneous

Weathered granite boulder

Granite, a quartz–feldspar-rich intrusive igneous rock

Likely pink granite (Granite, a coarse-grained felsic intrusive igneous rock, typically quartz + feldspar + mica) — igneous

Likely pink granite

Granite, a coarse-grained felsic intrusive igneous rock, typically quartz + feldspar + mica

Polished rhyolite (likely rainforest jasper) (Rhyolite, a silica-rich volcanic rock; exact identification cannot be confirmed from the photo) — igneous

Polished rhyolite (likely rainforest jasper)

Rhyolite, a silica-rich volcanic rock; exact identification cannot be confirmed from the photo

Granite (likely weathered) (Granite, a quartz–feldspar–mica intrusive igneous rock) — igneous

Granite (likely weathered)

Granite, a quartz–feldspar–mica intrusive igneous rock

Tumbled pink granite (Granite (quartz, feldspar, and mica; exact variety uncertain)) — igneous

Tumbled pink granite

Granite (quartz, feldspar, and mica; exact variety uncertain)

Banded Sedimentary Rock (Stratified Siliciclastic / Arenite or Siltstone with Mineral Bands) — sedimentary

Banded Sedimentary Rock

Stratified Siliciclastic / Arenite or Siltstone with Mineral Bands

Fossil Sea Urchin (Echinoid) (Echinoidea fossil (often replaced by silica or calcite)) — fossil

Fossil Sea Urchin (Echinoid)

Echinoidea fossil (often replaced by silica or calcite)

Granite (Felsic intrusive igneous rock) — igneous

Granite

Felsic intrusive igneous rock

Nephrite Jade (Nephrite) — Mineral/Rock

Nephrite Jade

Nephrite

Pegmatite, probably mica-rich (Granitic pegmatite composed mainly of quartz, feldspar, and mica (likely biotite and/or muscovite)) — igneous

Pegmatite, probably mica-rich

Granitic pegmatite composed mainly of quartz, feldspar, and mica (likely biotite and/or muscovite)

Weathered granitic rock (Granite (quartz–feldspar–mica intrusive rock; exact variety uncertain)) — igneous

Weathered granitic rock

Granite (quartz–feldspar–mica intrusive rock; exact variety uncertain)

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

Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Gneiss (likely Granitic Gneiss) (Gneiss) — metamorphic

Gneiss (likely Granitic Gneiss)

Gneiss

Diorite (Diorite (Intermediate intrusive igneous rock)) — igneous

Diorite

Diorite (Intermediate intrusive igneous rock)

Granite (Granite (Mainly Quartz, Alkali Feldspar, and Plagioclase)) — igneous

Granite

Granite (Mainly Quartz, Alkali Feldspar, and Plagioclase)

Limestone with Calcite Veins (Calcium Carbonate (CaCO3)) — sedimentary

Limestone with Calcite Veins

Calcium Carbonate (CaCO3)

Banded Gneiss (Gneiss (high-grade metamorphic silicate rock)) — metamorphic

Banded Gneiss

Gneiss (high-grade metamorphic silicate rock)

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

Granite Gneiss

Gneiss (High-grade Metamorphic Rock)

Foliated Metamorphic Rock (likely Gneiss or Schist) (Gneissic Metamorphic Rock) — metamorphic

Foliated Metamorphic Rock (likely Gneiss or Schist)

Gneissic Metamorphic Rock

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

Gneiss

Gneiss (high-grade metamorphic rock)