Rock Identifier

Community gallery

All rocks & minerals

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

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

Chert (Chert Nodule)

Silicon Dioxide (SiO2)

sedimentary
Chert (with Iron Staining) (Chert (SiO2)) — sedimentary

Chert (with Iron Staining)

Chert (SiO2)

sedimentary
Chert (Jasper influence) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper influence)

Microcrystalline Quartz (SiO2)

sedimentary
Mica Schist (Mica Schist (Quartz-Biotite-Muscovite Schist)) — metamorphic

Mica Schist

Mica Schist (Quartz-Biotite-Muscovite Schist)

metamorphic
Quartzite (Quartzite (chiefly SiO2)) — metamorphic

Quartzite

Quartzite (chiefly SiO2)

metamorphic
Granite (Granite (Phaneritic Quartz-Feldspar rock)) — igneous

Granite

Granite (Phaneritic Quartz-Feldspar rock)

igneous
Gneiss (Gneiss (quartz-feldspar-biotite gneiss)) — metamorphic

Gneiss

Gneiss (quartz-feldspar-biotite gneiss)

metamorphic
Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

metamorphic
Emerald in Matrix (Beryl (Be3Al2Si6O18)) — mineral

Emerald in Matrix

Beryl (Be3Al2Si6O18)

mineral
Granite Gneiss or Granitoid River Rock (Granitoid / Gneiss) — Metamorphic or Igneous

Granite Gneiss or Granitoid River Rock

Granitoid / Gneiss

Metamorphic or Igneous
Granite Gneiss River Rock (Gneiss) — Metamorphic

Granite Gneiss River Rock

Gneiss

Metamorphic
Andesite Porphyry (Andesite Porphyry) — Igneous

Andesite Porphyry

Andesite Porphyry

Igneous
Scoria (Scoria) — Igneous

Scoria

Scoria

Igneous
Brecciated Jasper or Chert (SiO2) — Sedimentary/Metamorphic

Brecciated Jasper or Chert

SiO2

Sedimentary/Metamorphic
Brecciated stone pebble (Breccia) — sedimentary

Brecciated stone pebble

Breccia

sedimentary
Brecciated Limestone or Marble Pebble (Breccia / Calcite (CaCO3)) — Sedimentary / Metamorphic

Brecciated Limestone or Marble Pebble

Breccia / Calcite (CaCO3)

Sedimentary / Metamorphic
Picasso Stone (Metamorphic Limestone (Marble)) — metamorphic

Picasso Stone

Metamorphic Limestone (Marble)

metamorphic
Granite (Granite) — Igneous

Granite

Granite

Igneous
Quartzite (Quartzite) — Metamorphic

Quartzite

Quartzite

Metamorphic
Jasper (Silicon dioxide (SiO2)) — Sedimentary / Mineral

Jasper

Silicon dioxide (SiO2)

Sedimentary / Mineral
Jasper (Silicon dioxide, SiO2) — Mineral

Jasper

Silicon dioxide, SiO2

Mineral
Quartz Pebble (Silicon Dioxide (SiO2)) — Mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Mineral
Granite (Granite) — Igneous

Granite

Granite

Igneous
Basalt (Basalt) — igneous

Basalt

Basalt

igneous
Granite (Granite) — Igneous

Granite

Granite

Igneous
Hag Stone (Flint / Chert / Limestone concretion with a natural hole) — sedimentary

Hag Stone

Flint / Chert / Limestone concretion with a natural hole

sedimentary
Quartzite with inclusions or weathered surface (Quartzite) — metamorphic

Quartzite with inclusions or weathered surface

Quartzite

metamorphic
Granite or Porphyritic Igneous Rock (weathered) (Granitoid) — Igneous

Granite or Porphyritic Igneous Rock (weathered)

Granitoid

Igneous
Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

sedimentary
Quartz pebble / River stone (SiO2 (Silicon Dioxide)) — mineral

Quartz pebble / River stone

SiO2 (Silicon Dioxide)

mineral
Quartzite with inclusions or a banded chert (Quartzite or Chert) — Metamorphic or Sedimentary

Quartzite with inclusions or a banded chert

Quartzite or Chert

Metamorphic or Sedimentary
Hag Stone (Naturally holed stone (typically sedimentary rock such as flint, limestone, or sandstone)) — Sedimentary

Hag Stone

Naturally holed stone (typically sedimentary rock such as flint, limestone, or sandstone)

Sedimentary
Pumice or Tuff (Pumice / Tuff) — igneous

Pumice or Tuff

Pumice / Tuff

igneous
Coquina / Fossiliferous Limestone (Fossiliferous Limestone (CaCO3)) — Sedimentary

Coquina / Fossiliferous Limestone

Fossiliferous Limestone (CaCO3)

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

Granite

Granite (Phaneritic intrusive igneous rock)

igneous
Serpentine (Serpentine (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4) — metamorphic

Serpentine

Serpentine (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4

metamorphic
Banded Agate (Cryptocrystalline Quartz (SiO2)) — mineral

Banded Agate

Cryptocrystalline Quartz (SiO2)

mineral
Amethyst (Silicon Dioxide (SiO2) with iron impurities) — mineral

Amethyst

Silicon Dioxide (SiO2) with iron impurities

mineral
Rhodonite (Manganese silicate (Mn,Fe,Mg,Ca)SiO3) — mineral

Rhodonite

Manganese silicate (Mn,Fe,Mg,Ca)SiO3

mineral
Kyanite (Kyanite (Al2SiO5)) — mineral

Kyanite

Kyanite (Al2SiO5)

mineral
Rhodonite (Manganese Silicate (Mn,Fe,Mg,Ca)SiO3) — mineral

Rhodonite

Manganese Silicate (Mn,Fe,Mg,Ca)SiO3

mineral
Banded Agate (Onyx type) (Silicon dioxide (SiO2)) — mineral

Banded Agate (Onyx type)

Silicon dioxide (SiO2)

mineral