Rock Identifier

Category

Minerals

Browse minerals specimens identified by the Rock Identifier community.

Learn about Minerals in the encyclopedia

Glauconite

Hutcheonite

Halite

Sperrylite

Baddeleyite

Anatase

Brookite

Talc

Euxenite

Eltyubyuite

Buergerite

Dolomite

Quartz Crystal Cluster (Silicon Dioxide (SiO2)) — mineral

Quartz Crystal Cluster

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Agate (Agate (Chalcedony), SiO2) — Mineral

Agate

Agate (Chalcedony), SiO2

Pegmatite (Quartz, Feldspar, and Tourmaline/Biotite) (Pegmatitic Igneous Rock) — igneous

Pegmatite (Quartz, Feldspar, and Tourmaline/Biotite)

Pegmatitic Igneous Rock

Small transparent crystal fragment, possibly quartz (Quartz (SiO₂), tentative identification) — mineral

Small transparent crystal fragment, possibly quartz

Quartz (SiO₂), tentative identification

Quartz with Tourmaline Inclusions (SiO2 with NaFe3Al6(BO3)3Si6O18(OH)4) — mineral

Quartz with Tourmaline Inclusions

SiO2 with NaFe3Al6(BO3)3Si6O18(OH)4

Howlite (Ca2B5SiO9(OH)5) — mineral

Howlite

Ca2B5SiO9(OH)5

Travertine (Calcium Carbonate (CaCO3)) — sedimentary

Travertine

Calcium Carbonate (CaCO3)

Limonite (FeO(OH)·nH2O) — mineral

Limonite

FeO(OH)·nH2O

Small tumbled quartz pebble (Quartz (silicon dioxide, SiO₂), possibly iron-stained milky quartz) — mineral

Small tumbled quartz pebble

Quartz (silicon dioxide, SiO₂), possibly iron-stained milky quartz

Granite Pebble (Granite) — igneous

Granite Pebble

Granite

Milky quartz with iron staining (Quartz (silicon dioxide, SiO₂), likely massive or vein quartz) — mineral

Milky quartz with iron staining

Quartz (silicon dioxide, SiO₂), likely massive or vein quartz

Banded gneiss (likely garnet-biotite or quartz-feldspar gneiss) (Gneiss; predominantly quartz (SiO₂), feldspar, and dark biotite/amphibole) — metamorphic

Banded gneiss (likely garnet-biotite or quartz-feldspar gneiss)

Gneiss; predominantly quartz (SiO₂), feldspar, and dark biotite/amphibole

Limonite / Goethite Ironstone (FeO(OH)·nH2O (Hydrous iron oxide)) — mineral

Limonite / Goethite Ironstone

FeO(OH)·nH2O (Hydrous iron oxide)

Mixed Mineral Collection (with Titanium Aura Quartz) (Silicon Dioxide (SiO2) with metallic coatings and various silicates) — mineral

Mixed Mineral Collection (with Titanium Aura Quartz)

Silicon Dioxide (SiO2) with metallic coatings and various silicates

Calcite on Matrix (Calcium Carbonate (CaCO3)) — mineral

Calcite on Matrix

Calcium Carbonate (CaCO3)

Small quartz pebble or silica-rich mineral fragment (Quartz (SiO₂), tentative) — mineral

Small quartz pebble or silica-rich mineral fragment

Quartz (SiO₂), tentative

Granite Pebble (Phaneritic intrusive igneous rock) — igneous

Granite Pebble

Phaneritic intrusive igneous rock

Granite (Giallo Ornamental / Venetian Gold) (Granite (composed mainly of Quartz, Feldspar, Biotite, and Garnet)) — igneous

Granite (Giallo Ornamental / Venetian Gold)

Granite (composed mainly of Quartz, Feldspar, Biotite, and Garnet)

Granite (Granite (Phaneritic Igneous Rock)) — igneous

Granite

Granite (Phaneritic Igneous Rock)

Granodiorite / Granite (Weathered) (Granodiorite) — Igneous

Granodiorite / Granite (Weathered)

Granodiorite

Likely quartz-rich rock fragment (Quartz (silicon dioxide, SiO₂), possibly in a granitic or pegmatitic matrix) — mineral

Likely quartz-rich rock fragment

Quartz (silicon dioxide, SiO₂), possibly in a granitic or pegmatitic matrix

Greenstone / Diabase Porphyry (Porphyritic Diabase (Micro-gabbro)) — Igneous

Greenstone / Diabase Porphyry

Porphyritic Diabase (Micro-gabbro)

Basalt (Basalt) — igneous

Basalt

Basalt

Petrified Wood (Silicified Wood (SiO2)) — fossil

Petrified Wood

Silicified Wood (SiO2)

Quartz crystal cluster (likely iron-stained quartz) (Quartz, silicon dioxide (SiO₂), with possible iron-oxide inclusions) — mineral

Quartz crystal cluster (likely iron-stained quartz)

Quartz, silicon dioxide (SiO₂), with possible iron-oxide inclusions

Blue apatite (likely dyed or enhanced) (Apatite group; fluorapatite, Ca5(PO4)3F, is the common blue variety) — mineral

Blue apatite (likely dyed or enhanced)

Apatite group; fluorapatite, Ca5(PO4)3F, is the common blue variety

Quartz Crystal (Silicon Dioxide (SiO2)) — mineral

Quartz Crystal

Silicon Dioxide (SiO2)

Polished Bumblebee jasper (Bumblebee jasper (calcite–orpiment/realgar-rich volcanic material; composition varies)) — mineral

Polished Bumblebee jasper

Bumblebee jasper (calcite–orpiment/realgar-rich volcanic material; composition varies)

Quartz-rich rock fragment (Microcrystalline quartz (SiO₂), possibly chalcedony or quartz-bearing breccia) — mineral

Quartz-rich rock fragment

Microcrystalline quartz (SiO₂), possibly chalcedony or quartz-bearing breccia

Limonite (FeO(OH)·nH2O) — mineral

Limonite

FeO(OH)·nH2O

Limonite with Quartz (Hydrated Iron Oxide Hydroxide, FeO(OH)·nH₂O with SiO₂) — mineral

Limonite with Quartz

Hydrated Iron Oxide Hydroxide, FeO(OH)·nH₂O with SiO₂

Limonite with Gossan / Iron Ore (Hydrated iron oxide-hydroxide, approximately FeO(OH)·nH2O) — mineral

Limonite with Gossan / Iron Ore

Hydrated iron oxide-hydroxide, approximately FeO(OH)·nH2O

Fossil Shark Tooth (Chondrichthyes (Class)) — fossil

Fossil Shark Tooth

Chondrichthyes (Class)

Olivine ((Mg,Fe)2SiO4) — mineral

Olivine

(Mg,Fe)2SiO4

Shark Tooth Fossil (Carcharocles megalodon or similar extinct shark tooth) — fossil

Shark Tooth Fossil

Carcharocles megalodon or similar extinct shark tooth

Tiny metallic mineral fragment, possibly native gold (Native gold (Au), unconfirmed; could also be pyrite or chalcopyrite) — mineral

Tiny metallic mineral fragment, possibly native gold

Native gold (Au), unconfirmed; could also be pyrite or chalcopyrite

Weathered quartz-rich rock fragment (Indeterminate; likely quartz-bearing granitoid or quartzite) — mineral

Weathered quartz-rich rock fragment

Indeterminate; likely quartz-bearing granitoid or quartzite

Quartz-bearing pegmatitic rock, likely granite/pegmatite (Feldspar–quartz pegmatite; chiefly K-feldspar, plagioclase, quartz, and possible mica) — igneous

Quartz-bearing pegmatitic rock, likely granite/pegmatite

Feldspar–quartz pegmatite; chiefly K-feldspar, plagioclase, quartz, and possible mica

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

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)

Granite (Intrusive igneous rock) — igneous

Granite

Intrusive igneous rock