Rock Identifier

Category

Igneous

Browse igneous specimens identified by the Rock Identifier community.

Learn about Igneous in the encyclopedia

Albitite

Alnöite

Andesite

Anorthosite

Apache Tears

Banded Obsidian

Banded Obsidian

Basalt

Black Obsidian

Blue Pearl Granite

Blue Pearl Granite

Boninite

Bostonite

Brown Obsidian

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

Magnetite

Magnetite (Iron(II,III) oxide, Fe3O4)

Quartz-rich pegmatite with green epidote or chlorite (Pegmatitic quartz–feldspar rock, likely containing epidote (Ca₂(Al,Fe)₃Si₃O₁₂(OH)) and/or chlorite) — igneous

Quartz-rich pegmatite with green epidote or chlorite

Pegmatitic quartz–feldspar rock, likely containing epidote (Ca₂(Al,Fe)₃Si₃O₁₂(OH)) and/or chlorite

Copper Ore (Mixed copper sulfides/oxides in gangue matrix) — mineral

Copper Ore

Mixed copper sulfides/oxides in gangue matrix

Quartz Vein in Host Rock (Silicon Dioxide (SiO2)) — mineral

Quartz Vein in Host Rock

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Granite (Phaneritic plutonic rock (SiO2 range 65-75%)) — igneous

Granite

Phaneritic plutonic rock (SiO2 range 65-75%)

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

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz with Iron Inclusions (Silicon Dioxide (SiO2)) — mineral

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

Rose Quartz (Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese) — mineral

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Epidote (Epidote Group (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))) — metamorphic

Epidote

Epidote Group (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

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

Quartz (Iron-Stained)

Silicon Dioxide (SiO2)

Granite Pebble (Pink/Orthoclase Granite) (Granite) — igneous

Granite Pebble (Pink/Orthoclase Granite)

Granite

Dark igneous rock, likely basalt or diabase, with a second purplish specimen (Basalt/diabase; exact identification is uncertain from the photograph) — igneous

Dark igneous rock, likely basalt or diabase, with a second purplish specimen

Basalt/diabase; exact identification is uncertain from the photograph

Gabbro Pebble (Polished Beach/River Stone) (Gabbro) — igneous

Gabbro Pebble (Polished Beach/River Stone)

Gabbro

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)

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

Magnetite

Iron(II,III) oxide (Fe3O4)

Small dark mineral or rock fragment (Undetermined; possibly a dark mafic mineral such as biotite or magnetite) — mineral

Small dark mineral or rock fragment

Undetermined; possibly a dark mafic mineral such as biotite or magnetite

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Dalmatian Stone (Dalmatian Stone (formerly called Dalmatian Jasper)) — igneous

Dalmatian Stone

Dalmatian Stone (formerly called Dalmatian Jasper)

Granite (Phaneritic Felsic Igneous Rock) — igneous

Granite

Phaneritic Felsic Igneous Rock

Labradorite rough (Labradorite, a calcium-rich plagioclase feldspar (approximately (Ca,Na)(Al,Si)₄O₈)) — mineral

Labradorite rough

Labradorite, a calcium-rich plagioclase feldspar (approximately (Ca,Na)(Al,Si)₄O₈)

Tumbled sodalite (Sodalite, Na8(Al6Si6O24)Cl2, commonly occurring in nepheline-syenite rocks) — mineral

Tumbled sodalite

Sodalite, Na8(Al6Si6O24)Cl2, commonly occurring in nepheline-syenite rocks

Tumbled banded stone, likely labradorite or larvikite (Plagioclase feldspar aggregate; commonly labradorite (labradorescence) or larvikite) — mineral

Tumbled banded stone, likely labradorite or larvikite

Plagioclase feldspar aggregate; commonly labradorite (labradorescence) or larvikite

Tumbled quartz-rich pebble (Microcrystalline quartz (SiO₂), possibly milky quartz or chalcedony) — mineral

Tumbled quartz-rich pebble

Microcrystalline quartz (SiO₂), possibly milky quartz or chalcedony

Milky quartz (iron-stained quartz) (Quartz, silicon dioxide (SiO₂)) — mineral

Milky quartz (iron-stained quartz)

Quartz, silicon dioxide (SiO₂)

Weathered vesicular basalt (likely amygdaloidal basalt) (Basalt, chiefly plagioclase and pyroxene with possible olivine; cavities may contain secondary zeolites, calcite, or silica) — igneous

Weathered vesicular basalt (likely amygdaloidal basalt)

Basalt, chiefly plagioclase and pyroxene with possible olivine; cavities may contain secondary zeolites, calcite, or silica

Porphyritic basalt or andesite cobble (Fine-grained volcanic rock, likely plagioclase–pyroxene basalt/andesite) — igneous

Porphyritic basalt or andesite cobble

Fine-grained volcanic rock, likely plagioclase–pyroxene basalt/andesite

Granite (Orthoclase rich) (Granite (composed primarily of Quartz and Potassium Feldspar KAlSi3O8)) — igneous

Granite (Orthoclase rich)

Granite (composed primarily of Quartz and Potassium Feldspar KAlSi3O8)

Granite Pebble (Pink/Orthoclase Granite) (Granite (rich in Potassium Feldspar / Orthoclase)) — igneous

Granite Pebble (Pink/Orthoclase Granite)

Granite (rich in Potassium Feldspar / Orthoclase)

Mica (Phlogopite or Biotite group (KMg3(AlSi3O10)(F,OH)2 / K(Mg,Fe)3AlSi3O10(OH)2)) — mineral

Mica

Phlogopite or Biotite group (KMg3(AlSi3O10)(F,OH)2 / K(Mg,Fe)3AlSi3O10(OH)2)

Granite (Phaneritic Igneous Rock (Granite)) — igneous

Granite

Phaneritic Igneous Rock (Granite)

Basalt (Extrusive mafic igneous rock) — igneous

Basalt

Extrusive mafic igneous rock

Granite (Granite (a common igneous rock)) — igneous

Granite

Granite (a common igneous rock)

Dalmatian Stone (Peralkaline Feldsphathic Igneous Rock) — igneous

Dalmatian Stone

Peralkaline Feldsphathic Igneous Rock

Sodalite (Na8(Al6Si6O24)Cl2) — mineral

Sodalite

Na8(Al6Si6O24)Cl2

Sodalite (Sodalite (Na8(Al6Si6O24)Cl2)) — mineral

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Hypersthene (or Enstatite/Ferrosilite) (Orthopyroxene series (Mg,Fe)SiO3 - specifically, historically hypersthene (intermediate member) now referred to as Enstatite (Mg-rich) or Ferrosilite (Fe-rich)) — Mineral

Hypersthene (or Enstatite/Ferrosilite)

Orthopyroxene series (Mg,Fe)SiO3 - specifically, historically hypersthene (intermediate member) now referred to as Enstatite (Mg-rich) or Ferrosilite (Fe-rich)