Rock Identifier

Category

Mineral

Browse mineral specimens identified by the Rock Identifier community.

Learn about Mineral in the encyclopedia

Acanthite

Adirondack Garnet

Adirondack Garnet

Adularia

Agate

Albite

Alkali Feldspar

Alkali Feldspar

Amazonite

Anatase

Andalusite

Angelite

Anglesite

Anhydrite

Epidote (Ca2(Al,Fe)3(SiO4)3(OH)) — mineral

Epidote

Ca2(Al,Fe)3(SiO4)3(OH)

Gneiss or Schist (Gneiss or Mica Schist with Garnet) — Metamorphic

Gneiss or Schist

Gneiss or Mica Schist with Garnet

Limonite (FeO(OH)•nH2O) — mineral

Limonite

FeO(OH)•nH2O

Limonite (FeO(OH)•nH2O) — mineral

Limonite

FeO(OH)•nH2O

Limonite (FeO(OH)•nH2O) — mineral

Limonite

FeO(OH)•nH2O

Limonite (FeO(OH)•nH2O) — mineral

Limonite

FeO(OH)•nH2O

Sandstone (with potential mineral staining/concretions) (Arenite (SiO2 based)) — sedimentary

Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

Limonite (FeO(OH)•nH2O) — mineral

Limonite

FeO(OH)•nH2O

Limonite (FeO(OH)•nH2O) — mineral

Limonite

FeO(OH)•nH2O

Pegmatite with Tourmaline (Pegmatite / Silicate) — igneous

Pegmatite with Tourmaline

Pegmatite / Silicate

Limonite (FeO(OH)•nH2O) — mineral

Limonite

FeO(OH)•nH2O

Tumbled granite (Granite, a coarse-grained felsic intrusive igneous rock) — igneous

Tumbled granite

Granite, a coarse-grained felsic intrusive igneous rock

Limonite (FeO(OH)•nH2O) — mineral

Limonite

FeO(OH)•nH2O

Limonite (FeO(OH)•nH2O) — mineral

Limonite

FeO(OH)•nH2O

Feldspar (Feldspar Group (Tectosilicate, e.g., KAlSi3O8)) — mineral

Feldspar

Feldspar Group (Tectosilicate, e.g., KAlSi3O8)

Pegmatite with Tourmaline and Quartz (Igneous Pegmatite) — igneous

Pegmatite with Tourmaline and Quartz

Igneous Pegmatite

Epidote (Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)) — metamorphic

Epidote

Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)

Limonite (FeO(OH)•nH2O) — mineral

Limonite

FeO(OH)•nH2O

Unidentified pink-and-gray mineral or rock specimen (Undetermined; the image is too blurry for reliable identification) — mineral

Unidentified pink-and-gray mineral or rock specimen

Undetermined; the image is too blurry for reliable identification

Limonite (FeO(OH)•nH2O) — mineral

Limonite

FeO(OH)•nH2O

Limonite (FeO(OH)•nH2O) — mineral

Limonite

FeO(OH)•nH2O

Limonite (FeO(OH)•nH2O) — mineral

Limonite

FeO(OH)•nH2O

Granite (Granite (Phaneritic intrusive igneous rock)) — igneous

Granite

Granite (Phaneritic intrusive igneous rock)

Pegmatite with Tourmaline (Igneous Pegmatite (Quartz-Feldspar matrix with Schorl Tourmaline)) — igneous

Pegmatite with Tourmaline

Igneous Pegmatite (Quartz-Feldspar matrix with Schorl Tourmaline)

Mineral Sand (Heavy Mineral Sand Concentrate) (Placer deposit concentrate containing minerals such as ilmenite, rutile, zircon, and magnetite) — mineral

Mineral Sand (Heavy Mineral Sand Concentrate)

Placer deposit concentrate containing minerals such as ilmenite, rutile, zircon, and magnetite

Granite (Intrusive Igneous Rock) — igneous

Granite

Intrusive Igneous Rock

Calcite–fluorite mineral specimen with iron-oxide staining (Calcite (CaCO₃), likely fluorite (CaF₂), with possible quartz and iron/manganese oxides) — mineral

Calcite–fluorite mineral specimen with iron-oxide staining

Calcite (CaCO₃), likely fluorite (CaF₂), with possible quartz and iron/manganese oxides

Septarian Pebble (Septarian nodule / Concretion) — sedimentary

Septarian Pebble

Septarian nodule / Concretion

Limonite (FeO(OH)·nH2O) — mineral

Limonite

FeO(OH)·nH2O

Marcasite Sun (Marcasite (FeS2)) — mineral

Marcasite Sun

Marcasite (FeS2)

Gypsum (variety Selenite or Alabaster) (Calcium sulfate dihydrate (CaSO4·2H2O)) — Mineral

Gypsum (variety Selenite or Alabaster)

Calcium sulfate dihydrate (CaSO4·2H2O)

Small brown mineral fragment (undetermined) (Unidentified; image detail is insufficient for a reliable species identification) — mineral

Small brown mineral fragment (undetermined)

Unidentified; image detail is insufficient for a reliable species identification

Schist (Schist) — Metamorphic

Schist

Schist

Limonite (FeO(OH)•nH2O) — mineral

Limonite

FeO(OH)•nH2O

Limonite (FeO(OH)•nH2O) — mineral

Limonite

FeO(OH)•nH2O

Yellow serpentine (likely serpentine-rich rock) (Serpentinite; chiefly serpentine-group minerals, such as antigorite, lizardite, and chrysotile) — metamorphic

Yellow serpentine (likely serpentine-rich rock)

Serpentinite; chiefly serpentine-group minerals, such as antigorite, lizardite, and chrysotile

Banded gneiss pebble (Gneiss, a foliated metamorphic rock composed mainly of quartz, feldspar, and dark biotite or amphibole) — metamorphic

Banded gneiss pebble

Gneiss, a foliated metamorphic rock composed mainly of quartz, feldspar, and dark biotite or amphibole

Soil with Mineral Detritus and Quartz Fragments (Regolith / Silicate Mineral Aggregate) — sedimentary

Soil with Mineral Detritus and Quartz Fragments

Regolith / Silicate Mineral Aggregate

Blue-green rough mineral specimen (identity uncertain) (Undetermined; the image is insufficient for a reliable mineral identification) — mineral

Blue-green rough mineral specimen (identity uncertain)

Undetermined; the image is insufficient for a reliable mineral identification

Topaz (Al2SiO4(F,OH)2) — mineral

Topaz

Al2SiO4(F,OH)2

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

Potassium Feldspar (Orthoclase)

Orthoclase (KAlSi3O8)

Pyrite in Quartz (Iron Sulfide in Silicon Dioxide (FeS2 + SiO2)) — mineral

Pyrite in Quartz

Iron Sulfide in Silicon Dioxide (FeS2 + SiO2)