Rock Identifier

Community gallery

All rocks & minerals

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

Pumice or Vesicular Basalt/Scoria (water-worn) (Vesicular volcanic rock) — igneous

Pumice or Vesicular Basalt/Scoria (water-worn)

Vesicular volcanic rock

igneous
Porphyritic Andesite or Basalt (Porphyritic Intermediate/Mafic Igneous Rock) — igneous

Porphyritic Andesite or Basalt

Porphyritic Intermediate/Mafic Igneous Rock

igneous
Granite (Granite) — igneous

Granite

Granite

igneous
Granodiorite (Granodiorite) — Igneous

Granodiorite

Granodiorite

Igneous
Greenstone (Chlorite schist or metabasalt depending on specific composition) — Metamorphic

Greenstone

Chlorite schist or metabasalt depending on specific composition

Metamorphic
Jasper (Silicon dioxide, SiO2) — Mineral

Jasper

Silicon dioxide, SiO2

Mineral
Olivine ((Mg, Fe)2SiO4) — Mineral

Olivine

(Mg, Fe)2SiO4

Mineral
Orange Calcite (Calcite (CaCO3)) — Mineral

Orange Calcite

Calcite (CaCO3)

Mineral
Selenite / Gypsum (Gypsum (CaSO4·2H2O)) — Mineral

Selenite / Gypsum

Gypsum (CaSO4·2H2O)

Mineral
Epidote with Quartz/Feldspar (Epidote (Ca2(Al, Fe)3(SiO4)3(OH)) with associated minerals in a host rock) — Mineral/Metamorphic rock

Epidote with Quartz/Feldspar

Epidote (Ca2(Al, Fe)3(SiO4)3(OH)) with associated minerals in a host rock

Mineral/Metamorphic rock
Quartzite (Quartzite) — metamorphic

Quartzite

Quartzite

metamorphic
Greenstone or Epidote-rich rock (Epidote or Chlorite schist/greenstone) — metamorphic

Greenstone or Epidote-rich rock

Epidote or Chlorite schist/greenstone

metamorphic
Quartz pebble (Silicon dioxide (SiO2)) — Mineral

Quartz pebble

Silicon dioxide (SiO2)

Mineral
Quartz pebble (Silicon dioxide (SiO2)) — Mineral

Quartz pebble

Silicon dioxide (SiO2)

Mineral
Greenish rock with white veins, possibly epidote or chlorite bearing rock with quartz/calcite veins (Altered mafic rock or Epidosite) — metamorphic or igneous alteration

Greenish rock with white veins, possibly epidote or chlorite bearing rock with quartz/calcite veins

Altered mafic rock or Epidosite

metamorphic or igneous alteration
Chert (Jasper variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper variety)

Microcrystalline Quartz (SiO2)

sedimentary
Porphyritic Andesite (Andesite) — Igneous

Porphyritic Andesite

Andesite

Igneous
Unidentified River Rock or Mudstone (N/A (Generic rock fragment)) — Sedimentary or Metamorphic

Unidentified River Rock or Mudstone

N/A (Generic rock fragment)

Sedimentary or Metamorphic
Basalt (Basalt) — Igneous

Basalt

Basalt

Igneous
Quartz or possibly Jasper/Chert. Looks like a tumbled or water-worn stone. (SiO2 (Silicon Dioxide)) — Mineral or Sedimentary (if chert)

Quartz or possibly Jasper/Chert. Looks like a tumbled or water-worn stone.

SiO2 (Silicon Dioxide)

Mineral or Sedimentary (if chert)
Chert (or potentially Jasper/Chalcedony) (SiO2 (Silicon Dioxide)) — sedimentary

Chert (or potentially Jasper/Chalcedony)

SiO2 (Silicon Dioxide)

sedimentary
Chert Fossil (Pebble) (Microcrystalline Quartz (SiO2) with biogenic inclusions) — sedimentary

Chert Fossil (Pebble)

Microcrystalline Quartz (SiO2) with biogenic inclusions

sedimentary
Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

mineral
Milky Quartz (Quartz (Silicon Dioxide, SiO2)) — mineral

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

mineral
Rose Quartz (Quartz (Silicon Dioxide - SiO2)) — mineral

Rose Quartz

Quartz (Silicon Dioxide - SiO2)

mineral
Amber (Succinite (approximate formula C10H16O)) — mineraloid

Amber

Succinite (approximate formula C10H16O)

mineraloid
Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

mineral
Basalt (Basalt (Aphanitic Mafic Volcanic Rock)) — igneous

Basalt

Basalt (Aphanitic Mafic Volcanic Rock)

igneous
Petrified Wood (Silicified Wood (primarily Quartz/SiO2)) — mineral

Petrified Wood

Silicified Wood (primarily Quartz/SiO2)

mineral
Yellow Jasper (Silicon Dioxide (SiO2) with iron oxide inclusions) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

sedimentary
Gabbro (Phaneritic Basic Igneous Rock) — igneous

Gabbro

Phaneritic Basic Igneous Rock

igneous
Script Jasper (Silicon Dioxide (SiO2) with impurities) — sedimentary

Script Jasper

Silicon Dioxide (SiO2) with impurities

sedimentary
Greenstone (Metabasalt / Greenschist facies rock) — Metamorphic

Greenstone

Metabasalt / Greenschist facies rock

Metamorphic
Andesite (Intermediate Volcanic Rock (Andesite)) — igneous

Andesite

Intermediate Volcanic Rock (Andesite)

igneous
Diorite (Diorite) — igneous

Diorite

Diorite

igneous
Basalt (Basalt (Mafic Extrusive Igneous Rock)) — igneous

Basalt

Basalt (Mafic Extrusive Igneous Rock)

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

Serpentinite

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

metamorphic
Amygdaloidal Basalt with Epidote (Amygdaloidal Basalt (Ca2(Al,Fe)3(SiO4)3(OH))) — igneous

Amygdaloidal Basalt with Epidote

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

igneous
Unakite or Epidote-Rich Granite (Unakite (Epidote, Orthoclase, and Quartz)) — metamorphic

Unakite or Epidote-Rich Granite

Unakite (Epidote, Orthoclase, and Quartz)

metamorphic
Vesicular Basalt (Basalt (Extrusive Igneous Rock)) — igneous

Vesicular Basalt

Basalt (Extrusive Igneous Rock)

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

Serpentinite

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

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

Chert (Jasper)

Microcrystalline Quartz (SiO2)

sedimentary