Rock Identifier

Category

Igneous, Sedimentary, And Metamorphic

Browse igneous, sedimentary, and metamorphic specimens identified by the Rock Identifier community.

Learn about Igneous, Sedimentary, And Metamorphic in the encyclopedia

Cordierite Hornfels

Cordierite Hornfels

Migmatite

Hornblende Schist

Hornblende Schist

Goldmanite

Feruvite

Andesine

Andesite

Andalusite

Andamooka Opal

Andradite Garnet

Andradite Garnet

Andesine-Labradorite

Andesine-Labradorite

Carbonatite

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Green Calcite (Calcium Carbonate (CaCO3)) — mineral

Green Calcite

Calcium Carbonate (CaCO3)

Quartz (Milky/Clear variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky/Clear variety)

Silicon Dioxide (SiO2)

Quartz (Citrine or Iron-Stained) (Silicon Dioxide (SiO2)) — mineral

Quartz (Citrine or Iron-Stained)

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Milky Quartz (Ferruginous variety) (Silicon Dioxide (SiO2)) — mineral

Milky Quartz (Ferruginous variety)

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

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

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

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

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

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

Quartz (Clear or Cloudy)

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (Gray/Smoky Varieties) (Silicon Dioxide (SiO2)) — mineral

Quartz (Gray/Smoky Varieties)

Silicon Dioxide (SiO2)

Banded gneiss pebble (Gneiss, likely quartz–feldspar–mica gneiss) — metamorphic

Banded gneiss pebble

Gneiss, likely quartz–feldspar–mica gneiss

Gneiss (River Cobble) (Metamorphic Gneiss) — metamorphic

Gneiss (River Cobble)

Metamorphic Gneiss

Rounded gray river pebble, likely fine-grained basalt or andesite (Basaltic-andesitic volcanic rock; commonly plagioclase feldspar, pyroxene, and minor iron oxides) — igneous

Rounded gray river pebble, likely fine-grained basalt or andesite

Basaltic-andesitic volcanic rock; commonly plagioclase feldspar, pyroxene, and minor iron oxides

Fossilized bivalve shell or shell-rich limestone (Likely an indeterminate fossil mollusk; calcite/aragonite (CaCO₃), possibly preserved in limestone) — fossil

Fossilized bivalve shell or shell-rich limestone

Likely an indeterminate fossil mollusk; calcite/aragonite (CaCO₃), possibly preserved in limestone

Magnetite Sand (Black Sand) (Magnetite (Fe3O4)) — mineral

Magnetite Sand (Black Sand)

Magnetite (Fe3O4)

Blue Calcite (Calcium Carbonate (CaCO3)) — mineral

Blue Calcite

Calcium Carbonate (CaCO3)

Magnetite (Lodestone) (Iron(II,III) oxide (Fe3O4)) — mineral

Magnetite (Lodestone)

Iron(II,III) oxide (Fe3O4)

Fuchsite (Green Muscovite / Mica Schist) (Chromian Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)) — metamorphic

Fuchsite (Green Muscovite / Mica Schist)

Chromian Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)

Small quartz-rich pebble or rock fragment (Quartz (silicon dioxide, SiO₂), possibly with iron-oxide staining or host-rock inclusions) — mineral

Small quartz-rich pebble or rock fragment

Quartz (silicon dioxide, SiO₂), possibly with iron-oxide staining or host-rock inclusions

Kaolinite (Kaolin) (Kaolinite (Al2Si2O5(OH)4)) — mineral

Kaolinite (Kaolin)

Kaolinite (Al2Si2O5(OH)4)

Labradorite (a variety of Feldspar) (Labradorite; (Na,Ca)(Al,Si)4O8 (a plagioclase feldspar)) — igneous

Labradorite (a variety of Feldspar)

Labradorite; (Na,Ca)(Al,Si)4O8 (a plagioclase feldspar)

Graphite (Graphite (Carbon, C)) — mineral

Graphite

Graphite (Carbon, C)

Magnetite (Lodestone) (Magnetite (Fe3O4)) — mineral

Magnetite (Lodestone)

Magnetite (Fe3O4)

Graphite (Graphite (Native Carbon), Formula: C) — Metamorphic

Graphite

Graphite (Native Carbon), Formula: C

Banded Gneiss (Gneiss (Metamorphic Rock)) — metamorphic

Banded Gneiss

Gneiss (Metamorphic Rock)

Schist (Metamorphic Rock (Schist)) — metamorphic

Schist

Metamorphic Rock (Schist)

Magnetite (Lodestone) (Magnetite (Fe3O4)) — mineral

Magnetite (Lodestone)

Magnetite (Fe3O4)

Gneiss (Gneiss (High-grade metamorphic rock)) — metamorphic

Gneiss

Gneiss (High-grade metamorphic rock)

Weathered schist or gneiss fragment (Quartz–feldspar–mica metamorphic rock; likely mica schist or gneiss) — metamorphic

Weathered schist or gneiss fragment

Quartz–feldspar–mica metamorphic rock; likely mica schist or gneiss

Magnetite-rich ironstone (probable magnetite ore) (Magnetite, Fe₃O₄, likely in a fine-grained ironstone matrix) — mineral

Magnetite-rich ironstone (probable magnetite ore)

Magnetite, Fe₃O₄, likely in a fine-grained ironstone matrix

Dalmatian Stone (Dalmatian Jasper (a misnomer) / Perthitic Igneous Rock) — igneous

Dalmatian Stone

Dalmatian Jasper (a misnomer) / Perthitic Igneous Rock

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon dioxide (SiO2)

Foliated Gneiss (Gneiss (Metamorphic Rock)) — metamorphic

Foliated Gneiss

Gneiss (Metamorphic Rock)

Gneiss (Foliated Metamorphic Gneiss) — metamorphic

Gneiss

Foliated Metamorphic Gneiss