Rock Identifier

Category

Igneous Or Metamorphic

Browse igneous or metamorphic specimens identified by the Rock Identifier community.

Included Quartz Beads (likely Phantom Quartz or Garden Quartz) (Quartz (SiO2) with various mineral inclusions) — Mineral

Included Quartz Beads (likely Phantom Quartz or Garden Quartz)

Quartz (SiO2) with various mineral inclusions

Quartzite (River Pebble) (Quartzite (composed primarily of Silica, SiO2)) — metamorphic

Quartzite (River Pebble)

Quartzite (composed primarily of Silica, SiO2)

Mica Schist (Mica Schist (Quartz-Biotit-Muscovite Schist)) — metamorphic

Mica Schist

Mica Schist (Quartz-Biotit-Muscovite Schist)

Olivine (Peridot) (Magnesium Iron Silicate (Mg,Fe)2SiO4) — mineral

Olivine (Peridot)

Magnesium Iron Silicate (Mg,Fe)2SiO4

Anthracite Coal (Anthracite (Carbon Content: 86%-97%)) — metamorphic

Anthracite Coal

Anthracite (Carbon Content: 86%-97%)

Schist (Mica Schist (Medium-grade Metamorphic Rock)) — Metamorphic

Schist

Mica Schist (Medium-grade Metamorphic Rock)

Tiger's Iron (Pseudomorphic Quartz Aggregate (contains SiO2 with Fe2O3 and FeOOH)) — metamorphic

Tiger's Iron

Pseudomorphic Quartz Aggregate (contains SiO2 with Fe2O3 and FeOOH)

Quartzite Pebble (SiO2 (Silicon Dioxide)) — metamorphic

Quartzite Pebble

SiO2 (Silicon Dioxide)

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

Rhodonite

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

Seraphinite (Clinochlore (a variety of the chlorite group)) — mineral

Seraphinite

Clinochlore (a variety of the chlorite group)

Unakite (Epidotized Granite) — metamorphic

Unakite

Epidotized Granite

Almandine Garnet in Matrix (Almandine Garnet (Fe3Al2(SiO4)3) in Schist/Quartz Matrix) — metamorphic

Almandine Garnet in Matrix

Almandine Garnet (Fe3Al2(SiO4)3) in Schist/Quartz Matrix

Unakite (Epidotized Granite) — metamorphic

Unakite

Epidotized Granite

Quartzite with Chlorite/Epidote (Metamorphosed Quartzite (SiO2)) — metamorphic

Quartzite with Chlorite/Epidote

Metamorphosed Quartzite (SiO2)

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

Specular Hematite (Specularite)

Iron(III) oxide (Fe2O3)

Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2 (Chromium-rich Muscovite)) — mineral

Fuchsite

K(Al,Cr)2(AlSi3O10)(OH)2 (Chromium-rich Muscovite)

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

Rhodonite

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

Kyanite (Kyanite (Al2SiO5)) — mineral

Kyanite

Kyanite (Al2SiO5)

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

Rhodonite

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

Zoisite with Ruby (Anyolite (Ca2Al3(SiO4)3(OH) with Al2O3:Cr)) — metamorphic

Zoisite with Ruby

Anyolite (Ca2Al3(SiO4)3(OH) with Al2O3:Cr)

Nephrite Jade (Ca2(Mg, Fe)5Si8O22(OH)2) — metamorphic

Nephrite Jade

Ca2(Mg, Fe)5Si8O22(OH)2

Tiger's Eye (Pseudomorph of quartz after crocidolite (SiO2 with iron oxide inclusions)) — metamorphic

Tiger's Eye

Pseudomorph of quartz after crocidolite (SiO2 with iron oxide inclusions)

Quartzite with Chlorite (Metamosphosed Quartz Sandstone (SiO2 with (Mg,Fe)3(Si,Al)4O10(OH)2 inclusions)) — metamorphic

Quartzite with Chlorite

Metamosphosed Quartz Sandstone (SiO2 with (Mg,Fe)3(Si,Al)4O10(OH)2 inclusions)

Schist (Mica Schist) — metamorphic

Schist

Mica Schist

Prasiolite and Quartz Crystal Cluster (Quartz (SiO2); Prasiolite is a variety of Quartz) — mineral

Prasiolite and Quartz Crystal Cluster

Quartz (SiO2); Prasiolite is a variety of Quartz

Schist (Schist (various mineral compositions)) — Metamorphic

Schist

Schist (various mineral compositions)

Unakite (Epidotized Granite) (Unakite; primarily composed of Epidote (Ca2(Al,Fe)3(SiO4)3(OH)), Orthoclase (KAlSi3O8), and Quartz (SiO2)) — Metamorphic

Unakite (Epidotized Granite)

Unakite; primarily composed of Epidote (Ca2(Al,Fe)3(SiO4)3(OH)), Orthoclase (KAlSi3O8), and Quartz (SiO2)

Schist (Mica Schist (predominantly Muscovite or Biotite)) — metamorphic

Schist

Mica Schist (predominantly Muscovite or Biotite)

Anthracite Coal (Anthracite (Carbon-rich metamorphic coal)) — metamorphic

Anthracite Coal

Anthracite (Carbon-rich metamorphic coal)

Greenschist / Migmatite (Regional Metamorphic Complex (Facies: Greenschist to Amphibolite)) — metamorphic

Greenschist / Migmatite

Regional Metamorphic Complex (Facies: Greenschist to Amphibolite)

Quartzite (River-worn Shiner) (Quartzite (Formula: SiO2)) — metamorphic

Quartzite (River-worn Shiner)

Quartzite (Formula: SiO2)

Greenschist (Chlorite schist) — metamorphic

Greenschist

Chlorite schist

Quartz (Silicon Dioxide (SiO₂)) — Mineral

Quartz

Silicon Dioxide (SiO₂)

Schist/Phyllite (Metamorphic Schist (Chlorite Schist variety)) — metamorphic

Schist/Phyllite

Metamorphic Schist (Chlorite Schist variety)

Cream Marble (Speckled) (Metamorphosed Limestone (mainly CaCO3)) — metamorphic

Cream Marble (Speckled)

Metamorphosed Limestone (mainly CaCO3)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Quartzite pebble (Quartzite (SiO2)) — metamorphic

Quartzite pebble

Quartzite (SiO2)

Epidote in Matrix (Unakite-related) (Epidosite (Ca2(Al,Fe)3(SiO4)3(OH))) — metamorphic

Epidote in Matrix (Unakite-related)

Epidosite (Ca2(Al,Fe)3(SiO4)3(OH))

River Quartzite (or Quartz Cobble) (Quartzite (primarily Silicon Dioxide - SiO2)) — metamorphic

River Quartzite (or Quartz Cobble)

Quartzite (primarily Silicon Dioxide - SiO2)

Fuchsite Gneiss (Green Quartzite) (Chromium-rich Muscovite (KAl2(AlSi3O10)(OH)2 with Cr replacements)) — metamorphic

Fuchsite Gneiss (Green Quartzite)

Chromium-rich Muscovite (KAl2(AlSi3O10)(OH)2 with Cr replacements)

Schist (Micaceous Schist) (Schist (containing mainly Muscovite and Quartz)) — metamorphic

Schist (Micaceous Schist)

Schist (containing mainly Muscovite and Quartz)

Marble (Metamorphic rock composed of Recrystallized Carbonate Minerals (chiefly CaCO3)) — metamorphic

Marble

Metamorphic rock composed of Recrystallized Carbonate Minerals (chiefly CaCO3)