Rock Identifier

Category

Igneous, Sedimentary, Or Metamorphic (Mineral Based)

Browse igneous, sedimentary, or metamorphic (mineral based) specimens identified by the Rock Identifier community.

Banded Agate (Yellow Agate) (Silicon Dioxide (SiO2)) — mineral

Banded Agate (Yellow Agate)

Silicon Dioxide (SiO2)

Corundum (Ruby/Sapphire crystal) (Al2O3 (Aluminum Oxide)) — mineral

Corundum (Ruby/Sapphire crystal)

Al2O3 (Aluminum Oxide)

Sunstone (Aventurine Feldspar ((Ca,Na)(Al,Si)4O8)) — mineral

Sunstone

Aventurine Feldspar ((Ca,Na)(Al,Si)4O8)

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

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Orange Quartz (Crystalline Silicon Dioxide (SiO2) with iron oxide inclusions) — mineral

Orange Quartz

Crystalline Silicon Dioxide (SiO2) with iron oxide inclusions

White Quartz Pebble (Quartz (Silicon Dioxide, SiO2)) — mineral

White Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Sandstone (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone

Arenite (composed primarily of SiO2)

Blue Kyanite (Kyanite (Al2SiO5)) — metamorphic

Blue Kyanite

Kyanite (Al2SiO5)

Yellow Jasper (Silicon Dioxide (SiO2) with hydrated iron oxide impurities (Goethite)) — Mineral-based Sedimentary/Silica

Yellow Jasper

Silicon Dioxide (SiO2) with hydrated iron oxide impurities (Goethite)

Mineral-based Sedimentary/Silica

Pyrite (Fool's Gold) Cube (Iron Sulfide (FeS2)) — mineral

Pyrite (Fool's Gold) Cube

Iron Sulfide (FeS2)

Calcite (Optical or Clear Calcite) (Calcium Carbonate (CaCO3)) — mineral

Calcite (Optical or Clear Calcite)

Calcium Carbonate (CaCO3)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Black Star Diopside (Diopside (CaMgSi2O6) with Magnetite inclusions) — mineral

Black Star Diopside

Diopside (CaMgSi2O6) with Magnetite inclusions

Granodiorite (Granodiorite (Quartz + Plagioclase + Alkali Feldspar + Biotite/Hornblende)) — igneous

Granodiorite

Granodiorite (Quartz + Plagioclase + Alkali Feldspar + Biotite/Hornblende)

Granite (Granite) — igneous

Granite

Granite

Quartz (River Pebble) (Silicon Dioxide (SiO2)) — mineral

Quartz (River Pebble)

Silicon Dioxide (SiO2)

Basalt with Plagioclase Phenocrysts (Porphyritic Basalt (primarily SiO2, MgO, FeO, and CaO)) — Igneous

Basalt with Plagioclase Phenocrysts

Porphyritic Basalt (primarily SiO2, MgO, FeO, and CaO)

Epidote (Epidote Group (e.g., Clinozoisite, Epidote, Piemontite), Epidote formula: Ca2(Al,Fe)3(SiO4)3(OH)) — Mineral

Epidote

Epidote Group (e.g., Clinozoisite, Epidote, Piemontite), Epidote formula: Ca2(Al,Fe)3(SiO4)3(OH)

Coarse Sandstone Pebble (Clastic Sedimentary Rock (Sandstone)) — sedimentary

Coarse Sandstone Pebble

Clastic Sedimentary Rock (Sandstone)

White Topaz (Aluminum silicate fluoride hydroxide (Al2SiO4(F,OH)2)) — mineral

White Topaz

Aluminum silicate fluoride hydroxide (Al2SiO4(F,OH)2)

Ferruginous Siltstone or Mudstone (Ferruginous Siltstone / Goethitic Sandstone) — sedimentary

Ferruginous Siltstone or Mudstone

Ferruginous Siltstone / Goethitic Sandstone

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

Basalt

Basalt (Mafic Extrusive Igneous Rock)

Blue Kyanite (Kyanite (Al2SiO5)) — mineral

Blue Kyanite

Kyanite (Al2SiO5)

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

Rhodonite

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

Green Schist (Greenschist (composed of Chlorite, Actinolite, and Epidote)) — metamorphic

Green Schist

Greenschist (composed of Chlorite, Actinolite, and Epidote)

Porphyritic Andesite (Andesite (Intermediate Extrusive Volcanic Rock)) — igneous

Porphyritic Andesite

Andesite (Intermediate Extrusive Volcanic Rock)

Almandine Garnet in Matrix (Almandine, Fe3Al2(SiO4)3) — metamorphic

Almandine Garnet in Matrix

Almandine, Fe3Al2(SiO4)3

Dalmatian Stone (commonly Dyed) (Dalmatian Jasper (Peralkaline igneous rock)) — igneous

Dalmatian Stone (commonly Dyed)

Dalmatian Jasper (Peralkaline igneous rock)

Dendritic Agate (also known as Dendritic Siltstone or Mudstone) (Silicon Dioxide with Manganese/Iron Oxide inclusions (SiO2 + MnO2)) — sedimentary

Dendritic Agate (also known as Dendritic Siltstone or Mudstone)

Silicon Dioxide with Manganese/Iron Oxide inclusions (SiO2 + MnO2)

Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

Gold Nugget / Flake (Native Gold (Au)) — mineral

Gold Nugget / Flake

Native Gold (Au)

Iron-stained Quartz (with Limonite/Hematite) (Silicon Dioxide (SiO2) with Iron Oxide inclusions (FeO(OH) or Fe2O3)) — Mineral

Iron-stained Quartz (with Limonite/Hematite)

Silicon Dioxide (SiO2) with Iron Oxide inclusions (FeO(OH) or Fe2O3)

Granite (Granite (Felsic Plutonic Rock)) — igneous

Granite

Granite (Felsic Plutonic Rock)

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Mica Schist (Mica Schist (predominantly composed of Muscovite or Biotite silicates)) — metamorphic

Mica Schist

Mica Schist (predominantly composed of Muscovite or Biotite silicates)

Dalmation Stone (Peralkaline Rock (SiO2 with Arfvedsonite)) — igneous

Dalmation Stone

Peralkaline Rock (SiO2 with Arfvedsonite)

Zebra Stone (Silicified Siltstone) (Silicified Siltstone with Quartz/Kaolinite inclusions) — sedimentary

Zebra Stone (Silicified Siltstone)

Silicified Siltstone with Quartz/Kaolinite inclusions

Unakite or Epidosite (Epidosite (Mineral composition: Epidote, Feldspar, and Quartz)) — metamorphic

Unakite or Epidosite

Epidosite (Mineral composition: Epidote, Feldspar, and Quartz)

Sandstone (Iron-stained) (Arenite (composed primarily of SiO2 with Fe2O3 staining)) — sedimentary

Sandstone (Iron-stained)

Arenite (composed primarily of SiO2 with Fe2O3 staining)