Rock Identifier

Community gallery

All rocks & minerals

Every specimen the Rock Identifier community has discovered, from desert agates to deep-sea basalts.

Citrine Quartz (Silicon Dioxide (SiO2)) — mineral

Citrine Quartz

Silicon Dioxide (SiO2)

mineral
Citrine Quartz (Silicon Dioxide (SiO2)) — mineral

Citrine Quartz

Silicon Dioxide (SiO2)

mineral
Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

mineral
Agate (Chalcedony (SiO2)) — mineral

Agate

Chalcedony (SiO2)

mineral
Pebble (likely Limestone or Siltstone) (Lithic fragment (calcareous or siliciclastic)) — sedimentary

Pebble (likely Limestone or Siltstone)

Lithic fragment (calcareous or siliciclastic)

sedimentary
Basalt (Basalt) — igneous

Basalt

Basalt

igneous
Chert (Fossiliferous) (Chert (Cryptocrystalline Silica/SiO2)) — sedimentary

Chert (Fossiliferous)

Chert (Cryptocrystalline Silica/SiO2)

sedimentary
Basalt with Peridotite Xenolith (Mafic Igneous Rock with Peridotite Inclusion (Olivine-rich)) — igneous

Basalt with Peridotite Xenolith

Mafic Igneous Rock with Peridotite Inclusion (Olivine-rich)

igneous
Limestone with Fossil Imprints (Biogenic Limestone (Calcium Carbonate, CaCO3)) — sedimentary

Limestone with Fossil Imprints

Biogenic Limestone (Calcium Carbonate, CaCO3)

sedimentary
Blue Tiger's Eye (Silicified Riebeckite (SiO2)) — mineral

Blue Tiger's Eye

Silicified Riebeckite (SiO2)

mineral
Blue Tiger's Eye (Pseudomorph of Quartz after Crocidolite (SiO2)) — metamorphic

Blue Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

metamorphic
Tiger's Eye (Golden and Blue) (Silicon Dioxide (SiO2) with fibrous inclusions of Crocidolite) — mineral

Tiger's Eye (Golden and Blue)

Silicon Dioxide (SiO2) with fibrous inclusions of Crocidolite

mineral
Tiger's Eye (Pseudomorph of Quartz after Crocidolite (SiO2)) — metamorphic

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

metamorphic
Eurasite (or Ferruginous Sandstone) (Ferruginous Sandstone (SiO2 with Fe2O3/FeOOH)) — sedimentary

Eurasite (or Ferruginous Sandstone)

Ferruginous Sandstone (SiO2 with Fe2O3/FeOOH)

sedimentary
Quartzite River Cobble (Quartzite (primarily SiO2)) — metamorphic

Quartzite River Cobble

Quartzite (primarily SiO2)

metamorphic
Porphyry (Porphyritic Andesite or Rhyolite) — igneous

Porphyry

Porphyritic Andesite or Rhyolite

igneous
Sandstone (Arenite) — sedimentary

Sandstone

Arenite

sedimentary
Magnetite / Iron Ore (likely Hematite-Magnetite mix) (Magnetite (Fe3O4)) — mineral

Magnetite / Iron Ore (likely Hematite-Magnetite mix)

Magnetite (Fe3O4)

mineral
Basalt (Mafic Igneous Rock) — igneous

Basalt

Mafic Igneous Rock

igneous
Diamond (Natural Carbon (C)) — mineral

Diamond

Natural Carbon (C)

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

Hematite Mineral Ore

Iron(III) oxide (Fe2O3)

mineral
Anthracite Coal (Anthracite (Carbon-rich metamorphic rock)) — metamorphic

Anthracite Coal

Anthracite (Carbon-rich metamorphic rock)

metamorphic
Chert (Nodule) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Nodule)

Silicon Dioxide (SiO2)

sedimentary
Quartz Geode (Silicon Dioxide (SiO2)) — sedimentary

Quartz Geode

Silicon Dioxide (SiO2)

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

Specular Hematite

Iron(III) oxide (Fe2O3)

mineral
Agate (Banded Chalcedony) (Cryptocrystalline Silica (SiO2)) — mineral

Agate (Banded Chalcedony)

Cryptocrystalline Silica (SiO2)

mineral
Tumbled Quartz (Snow Quartz) (Silicon Dioxide (SiO2)) — mineral

Tumbled Quartz (Snow Quartz)

Silicon Dioxide (SiO2)

mineral
Yellow Chalcedony (Agate/Chert) (Cryptocrystalline Quartz (SiO2)) — mineral

Yellow Chalcedony (Agate/Chert)

Cryptocrystalline Quartz (SiO2)

mineral
Silicon (Element Si) — mineral

Silicon

Element Si

mineral
Quartzite Pebble (Metamorphic Quartzite (primarily SiO2)) — metamorphic

Quartzite Pebble

Metamorphic Quartzite (primarily SiO2)

metamorphic
Petrified Wood (Silicified Wood (SiO2)) — mineral

Petrified Wood

Silicified Wood (SiO2)

mineral
Larimar (Blue Pectolite (NaCa2Si3O8(OH))) — mineral

Larimar

Blue Pectolite (NaCa2Si3O8(OH))

mineral
Conglomerate (Conglomerate (Sedimentary Clastic Rock)) — sedimentary

Conglomerate

Conglomerate (Sedimentary Clastic Rock)

sedimentary
Black Obsidian (Obsidian (Amorphous Silicon Dioxide)) — igneous

Black Obsidian

Obsidian (Amorphous Silicon Dioxide)

igneous
Milky Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Milky Quartz Pebble

Silicon Dioxide (SiO2)

mineral
Citrine Quartz (Silicon Dioxide (SiO2) with iron impurities) — mineral

Citrine Quartz

Silicon Dioxide (SiO2) with iron impurities

mineral
Red Jasper (Silicon dioxide with iron impurities (SiO2)) — sedimentary

Red Jasper

Silicon dioxide with iron impurities (SiO2)

sedimentary
Sodalite (Na8(Al6Si6O24)Cl2) — mineral

Sodalite

Na8(Al6Si6O24)Cl2

mineral
Quartzite river stone (Quartzite (SiO2)) — metamorphic

Quartzite river stone

Quartzite (SiO2)

metamorphic
Bauxite (Bauxite (Al2O3·2H2O mixed with iron oxides)) — sedimentary

Bauxite

Bauxite (Al2O3·2H2O mixed with iron oxides)

sedimentary
Chert (Jasper/Flint variety) (Silicon dioxide (SiO2)) — sedimentary

Chert (Jasper/Flint variety)

Silicon dioxide (SiO2)

sedimentary
Chert (and Limestone Pebbles) (Silicon Dioxide (SiO2) / Sedimentary Microcrystalline Quartz) — sedimentary

Chert (and Limestone Pebbles)

Silicon Dioxide (SiO2) / Sedimentary Microcrystalline Quartz

sedimentary