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

Serpentinite (Serpentine-group minerals, chiefly antigorite, lizardite, and chrysotile; approximate formula Mg3Si2O5(OH)4) — metamorphic

Serpentinite

Serpentine-group minerals, chiefly antigorite, lizardite, and chrysotile; approximate formula Mg3Si2O5(OH)4

Greenstone pebble (Greenschist-facies mafic rock, commonly derived from basalt; likely rich in chlorite, actinolite, and epidote) — metamorphic

Greenstone pebble

Greenschist-facies mafic rock, commonly derived from basalt; likely rich in chlorite, actinolite, and epidote

Gravel (Unconsolidated rock fragments / detrital sediment) — sedimentary

Gravel

Unconsolidated rock fragments / detrital sediment

Granite (Intrusive Igneous Rock (Felsic)) — igneous

Granite

Intrusive Igneous Rock (Felsic)

Basalt with Vesicular Amygdule (Extrusive igneous rock (Mafic)) — igneous

Basalt with Vesicular Amygdule

Extrusive igneous rock (Mafic)

Iron-stained quartz vein in weathered host rock (Quartz (SiO₂) with iron-oxide/hydroxide staining; host rock undetermined) — metamorphic

Iron-stained quartz vein in weathered host rock

Quartz (SiO₂) with iron-oxide/hydroxide staining; host rock undetermined

Chalcopyrite-bearing quartz vein rock (Quartz (SiO₂) with likely chalcopyrite (CuFeS₂) and dark host rock; exact identification is uncertain from the photo) — mineral

Chalcopyrite-bearing quartz vein rock

Quartz (SiO₂) with likely chalcopyrite (CuFeS₂) and dark host rock; exact identification is uncertain from the photo

Schist (Schist (various mineral compositions)) — Metamorphic

Schist

Schist (various mineral compositions)

Sandstone with Quartz/Calcite druse (Arenite with druse (SiO2 or CaCO3)) — sedimentary

Sandstone with Quartz/Calcite druse

Arenite with druse (SiO2 or CaCO3)

Copper Ore (Malachite, Azurite, and Chalcopyrite in Host Rock) (Copper-bearing polymetallic mineral aggregate (Cu-minerals)) — mineral

Copper Ore (Malachite, Azurite, and Chalcopyrite in Host Rock)

Copper-bearing polymetallic mineral aggregate (Cu-minerals)

Weathered geode or vug-bearing rock (Likely a quartz- or calcite-lined geode/vug in a host rock; exact minerals cannot be confirmed from the image) — mineral

Weathered geode or vug-bearing rock

Likely a quartz- or calcite-lined geode/vug in a host rock; exact minerals cannot be confirmed from the image

Limonite or Goethite (Ironstone) (Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)) — mineral

Limonite or Goethite (Ironstone)

Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)

Kaolinite (China Clay) (Kaolinite (Al2Si2O5(OH)4)) — sedimentary

Kaolinite (China Clay)

Kaolinite (Al2Si2O5(OH)4)

Turquoise (CuAl6(PO4)4(OH)8·4H2O (Hydrous phosphate of copper and aluminum)) — mineral

Turquoise

CuAl6(PO4)4(OH)8·4H2O (Hydrous phosphate of copper and aluminum)

Limonite (FeO(OH)•nH2O) — mineral

Limonite

FeO(OH)•nH2O

Chrysocolla (Hydrated copper phyllosilicate, (Cu,Al)2H2Si2O5(OH)4·nH2O) — mineral

Chrysocolla

Hydrated copper phyllosilicate, (Cu,Al)2H2Si2O5(OH)4·nH2O

Malachite (Copper carbonate hydroxide [Cu2CO3(OH)2]) — mineral

Malachite

Copper carbonate hydroxide [Cu2CO3(OH)2]

Quartz-rich pegmatite with mica (Granitic pegmatite; mainly quartz (SiO₂), feldspar, and muscovite/biotite mica, with possible sulfide or iron-oxide staining) — igneous

Quartz-rich pegmatite with mica

Granitic pegmatite; mainly quartz (SiO₂), feldspar, and muscovite/biotite mica, with possible sulfide or iron-oxide staining

Diorite (Diorite (Phaneritic intermediate plutonic rock)) — igneous

Diorite

Diorite (Phaneritic intermediate plutonic rock)

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

Diorite

Diorite (Intermediate intrusive igneous rock)

Gneiss (Gneiss (Metamorphic Rock)) — metamorphic

Gneiss

Gneiss (Metamorphic Rock)

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

Gneiss (Metamorphic Pebble)

Gneiss (SiO2-rich metamorphic rock)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Granite (Granite (Felsic Plutonic Rock)) — igneous

Granite

Granite (Felsic Plutonic Rock)

Granodiorite (Granodiorite) — igneous

Granodiorite

Granodiorite

Yellow Apatite (Fluorapatite (Ca5(PO4)3(F,Cl,OH))) — mineral

Yellow Apatite

Fluorapatite (Ca5(PO4)3(F,Cl,OH))

Yellow Jade (Serpentine/Quartz) (Silicate mineral aggregate) — gemstone

Yellow Jade (Serpentine/Quartz)

Silicate mineral aggregate

Beaded Gemstone Bracelet (Composite Mineral Assemblage) — gemstone

Beaded Gemstone Bracelet

Composite Mineral Assemblage

Gemstone Beads (Various mineral species) — gemstone

Gemstone Beads

Various mineral species

Chakra Crystal Bracelet (Mixed Mineral Assortment) — gemstone

Chakra Crystal Bracelet

Mixed Mineral Assortment

River Stone (likely Basalt or Greywacke) (Basalt with mineral veining) — igneous

River Stone (likely Basalt or Greywacke)

Basalt with mineral veining

Sandstone (likely Arkosic or Lithic) (Clastic Sedimentary Rock (SiO2 with accessory minerals)) — sedimentary

Sandstone (likely Arkosic or Lithic)

Clastic Sedimentary Rock (SiO2 with accessory minerals)

Weathered, iron-stained metamorphic rock (likely gneiss or schist) (Uncertain from the photograph; possibly quartz–feldspar–mica gneiss or schist) — metamorphic

Weathered, iron-stained metamorphic rock (likely gneiss or schist)

Uncertain from the photograph; possibly quartz–feldspar–mica gneiss or schist

Peacock Ore (Bornite (Cu5FeS4) or iridescent Chalcopyrite (CuFeS2)) — mineral

Peacock Ore

Bornite (Cu5FeS4) or iridescent Chalcopyrite (CuFeS2)

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

Small rough mineral/rock specimen (not confidently identifiable) (Undetermined; image detail is insufficient for a reliable identification) — mineral

Small rough mineral/rock specimen (not confidently identifiable)

Undetermined; image detail is insufficient for a reliable identification

Dark speckled granite pebble (Granite, a quartz–feldspar–mica plutonic rock) — igneous

Dark speckled granite pebble

Granite, a quartz–feldspar–mica plutonic rock

Rough Diamond (Bort) (Diamond (C)) — mineral

Rough Diamond (Bort)

Diamond (C)

Mica schist (Schist dominated by muscovite/biotite mica, commonly with quartz and feldspar) — metamorphic

Mica schist

Schist dominated by muscovite/biotite mica, commonly with quartz and feldspar

Pegmatitic granite specimen (Granitic pegmatite, chiefly quartz (SiO₂), feldspar, and mica) — igneous

Pegmatitic granite specimen

Granitic pegmatite, chiefly quartz (SiO₂), feldspar, and mica

Gneiss (foliated metamorphic rock) (Gneiss) — metamorphic

Gneiss (foliated metamorphic rock)

Gneiss

Hag Stone (Perforated sedimentary rock (typically sandstone or limestone)) — sedimentary

Hag Stone

Perforated sedimentary rock (typically sandstone or limestone)