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

Orthoclase Feldspar (KAlSi3O8 (Potassium Aluminum Silicate)) — mineral

Orthoclase Feldspar

KAlSi3O8 (Potassium Aluminum Silicate)

Likely garnet (rough, iron-rich variety) (Possibly almandine garnet, Fe₃Al₂(SiO₄)₃; image alone cannot confirm identification) — mineral

Likely garnet (rough, iron-rich variety)

Possibly almandine garnet, Fe₃Al₂(SiO₄)₃; image alone cannot confirm identification

Dark mineral nodule with white veining (Possibly a calcite-veined manganese- or iron-rich concretion; exact identification requires testing) — mineral

Dark mineral nodule with white veining

Possibly a calcite-veined manganese- or iron-rich concretion; exact identification requires testing

Carved Sea Turtle Figurine (Aventurine / Quartz / Jasper) (Quartz variety (SiO2) / Polycrystalline Quartz Aggregate) — mineral

Carved Sea Turtle Figurine (Aventurine / Quartz / Jasper)

Quartz variety (SiO2) / Polycrystalline Quartz Aggregate

Serpentinite (probable) (Serpentinite, a rock composed chiefly of serpentine-group minerals such as antigorite, lizardite, or chrysotile) — metamorphic

Serpentinite (probable)

Serpentinite, a rock composed chiefly of serpentine-group minerals such as antigorite, lizardite, or chrysotile

Green serpentine-rich rock (possibly serpentinite) (Serpentinite, composed chiefly of serpentine-group minerals (e.g., lizardite, antigorite, or chrysotile)) — metamorphic

Green serpentine-rich rock (possibly serpentinite)

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

Rainbow Fluorite (Calcium Fluoride (CaF2)) — mineral

Rainbow Fluorite

Calcium Fluoride (CaF2)

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

Apatite (Fluorapatite, Chlorapatite, and Hydroxylapatite (Ca5(PO4)3(F,Cl,OH))) — mineral

Apatite

Fluorapatite, Chlorapatite, and Hydroxylapatite (Ca5(PO4)3(F,Cl,OH))

Mixed Rock and Mineral Collection (Multiple geological specimens) — mineral

Mixed Rock and Mineral Collection

Multiple geological specimens

Granite (Intrusive igneous rock) — igneous

Granite

Intrusive igneous rock

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Serpentine (likely antigorite-rich serpentinite fragment) (Serpentine-group minerals, chiefly Mg₃Si₂O₅(OH)₄) — metamorphic

Serpentine (likely antigorite-rich serpentinite fragment)

Serpentine-group minerals, chiefly Mg₃Si₂O₅(OH)₄

Potassium Feldspar (Orthoclase (KAlSi3O8)) — mineral

Potassium Feldspar

Orthoclase (KAlSi3O8)

Pink Feldspar (Orthoclase) (Orthoclase Feldspar (KAlSi3O8)) — mineral

Pink Feldspar (Orthoclase)

Orthoclase Feldspar (KAlSi3O8)

Satin Spar (Gypsum) (Calcium Sulfate Dihydrate (CaSO4·2H2O)) — mineral

Satin Spar (Gypsum)

Calcium Sulfate Dihydrate (CaSO4·2H2O)

Limonite / Ironstone (Limonite (Hydrated Iron Oxide) - FeO(OH)·nH2O) — mineral

Limonite / Ironstone

Limonite (Hydrated Iron Oxide) - FeO(OH)·nH2O

Likely fluorescent mineral specimen (Uncertain; possibly willemite (Zn₂SiO₄) or fluorite (CaF₂)) — mineral

Likely fluorescent mineral specimen

Uncertain; possibly willemite (Zn₂SiO₄) or fluorite (CaF₂)

Green Mica (Fuchsinite or Muscovite, KAl2(AlSi3O10)(OH)2) — mineral

Green Mica

Fuchsinite or Muscovite, KAl2(AlSi3O10)(OH)2

Blue goldstone (man-made glass) (Copper-bearing aventurine glass; synthetic silicate glass) — mineral

Blue goldstone (man-made glass)

Copper-bearing aventurine glass; synthetic silicate glass

Likely faceted garnet (Garnet group, commonly almandine (Fe₃Al₂(SiO₄)₃); identification from the photo is uncertain) — gemstone

Likely faceted garnet

Garnet group, commonly almandine (Fe₃Al₂(SiO₄)₃); identification from the photo is uncertain

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

Blue Apatite

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

Blue Apatite (Fluorapatite (Ca5(PO4)3F)) — mineral

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Gravel and Sand Mixture (Unconsolidated clastic sediment) — sedimentary

Gravel and Sand Mixture

Unconsolidated clastic sediment

Small dark pebble, likely a fine-grained metamorphic rock (Undetermined; possibly slate or amphibolite) — metamorphic

Small dark pebble, likely a fine-grained metamorphic rock

Undetermined; possibly slate or amphibolite

Gravel and Sediment Sample (Mixed clastic sediment) — sedimentary

Gravel and Sediment Sample

Mixed clastic sediment

Weathered banded gneiss (probable) (Foliated quartz–feldspar gneiss; exact minerals cannot be confirmed from the image) — metamorphic

Weathered banded gneiss (probable)

Foliated quartz–feldspar gneiss; exact minerals cannot be confirmed from the image

Rhodochrosite (Manganese Carbonate (MnCO3)) — mineral

Rhodochrosite

Manganese Carbonate (MnCO3)

Quartz-rich pegmatite (milky quartz with feldspar) (Quartz (SiO₂)–feldspar pegmatite, likely containing albite or orthoclase) — igneous

Quartz-rich pegmatite (milky quartz with feldspar)

Quartz (SiO₂)–feldspar pegmatite, likely containing albite or orthoclase

Quartz-rich rock, likely granite or quartz-bearing metamorphic rock (Undetermined; possibly granitic rock composed mainly of quartz and feldspar, with mica or other dark minerals) — igneous

Quartz-rich rock, likely granite or quartz-bearing metamorphic rock

Undetermined; possibly granitic rock composed mainly of quartz and feldspar, with mica or other dark minerals

Green copper-bearing rock, possibly chrysocolla-bearing matrix (Undetermined copper-mineralized rock; green areas may include chrysocolla, malachite, or chlorite) — metamorphic

Green copper-bearing rock, possibly chrysocolla-bearing matrix

Undetermined copper-mineralized rock; green areas may include chrysocolla, malachite, or chlorite

Granite (Granite, a coarse-grained intrusive felsic rock composed mainly of quartz, feldspar, and mica) — igneous

Granite

Granite, a coarse-grained intrusive felsic rock composed mainly of quartz, feldspar, and mica

Geode half (Geode (often quartz/chalcedony based)) — sedimentary or igneous

Geode half

Geode (often quartz/chalcedony based)

sedimentary or igneous

Hemimorphite (Hemimorphite (Zn4Si2O7(OH)2·H2O)) — mineral

Hemimorphite

Hemimorphite (Zn4Si2O7(OH)2·H2O)

Vesicular Basalt / Scoria pebble (Extrusive igneous rock with amygdaloidal infilling) — igneous

Vesicular Basalt / Scoria pebble

Extrusive igneous rock with amygdaloidal infilling

Green Aventurine (Quartz (SiO2) with fuchsite inclusions) — mineral

Green Aventurine

Quartz (SiO2) with fuchsite inclusions

Native Copper (Copper (Cu)) — mineral

Native Copper

Copper (Cu)

Yellow Ochre / Limonite (Hydrated ferric oxide (FeO(OH)·nH2O)) — mineral

Yellow Ochre / Limonite

Hydrated ferric oxide (FeO(OH)·nH2O)

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

Apatite

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

Quartz–feldspar–mica rock, possibly pegmatite (Coarse-grained granitic rock (compositionally granitic pegmatite); exact identification requires closer examination) — igneous

Quartz–feldspar–mica rock, possibly pegmatite

Coarse-grained granitic rock (compositionally granitic pegmatite); exact identification requires closer examination

Limonite (FeO(OH)·nH2O) — mineral

Limonite

FeO(OH)·nH2O

Unidentified small mineral specimen (Undetermined from the image) — mineral

Unidentified small mineral specimen

Undetermined from the image