Rock Identifier

Category

Igneous Or Metamorphic (Base Stone); Anthropogenic (Decoration)

Browse igneous or metamorphic (base stone); anthropogenic (decoration) specimens identified by the Rock Identifier community.

Learn about Igneous Or Metamorphic (Base Stone); Anthropogenic (Decoration) in the encyclopedia

Sard

Anthracite

Soapstone

Troctolite

Verdite

Cordierite Hornfels

Cordierite Hornfels

Migmatite

Dalmatian Jasper

Dalmatian Jasper

Jet

Lapis Lazuli

Apophyllite

Hornblende Schist

Hornblende Schist

Talc Schist / Soapstone (Talc (Mg3Si4O10(OH)2)) — metamorphic

Talc Schist / Soapstone

Talc (Mg3Si4O10(OH)2)

Red Quartzite (Metamorphic Quartzite (SiO2)) — metamorphic

Red Quartzite

Metamorphic Quartzite (SiO2)

Mica Sand / Vermiculite (Phyllosilicate group (typically Biotite or Muscovite)) — mineral

Mica Sand / Vermiculite

Phyllosilicate group (typically Biotite or Muscovite)

Quartzite (Quartzite (SiO2 based)) — metamorphic

Quartzite

Quartzite (SiO2 based)

Blue Sapphire (Corundum (Al2O3)) — mineral

Blue Sapphire

Corundum (Al2O3)

Banded gneiss, probably granitic gneiss (Foliated gneiss composed mainly of quartz (SiO₂), feldspar—orthoclase/microcline and plagioclase—and dark mica, commonly biotite K(Mg,Fe)₃AlSi₃O₁₀(F,OH)₂) — metamorphic

Banded gneiss, probably granitic gneiss

Foliated gneiss composed mainly of quartz (SiO₂), feldspar—orthoclase/microcline and plagioclase—and dark mica, commonly biotite K(Mg,Fe)₃AlSi₃O₁₀(F,OH)₂

Basalt (River Stone) (Extrusive mafic igneous rock) — igneous

Basalt (River Stone)

Extrusive mafic igneous rock

Rhyolite Porphyry (Rhyolite (High-silica volcanic rock)) — igneous

Rhyolite Porphyry

Rhyolite (High-silica volcanic rock)

Muscovite Mica (Granitic Pegmatite) (Muscovite - KAl2(AlSi3O10)(OH)2) — mineral

Muscovite Mica (Granitic Pegmatite)

Muscovite - KAl2(AlSi3O10)(OH)2

Granite (Felsic Plutonic Igneous Rock) — igneous

Granite

Felsic Plutonic Igneous Rock

Grey Agate (Silicon Dioxide (SiO2) - variety: Agate/Chalcedony) — mineral

Grey Agate

Silicon Dioxide (SiO2) - variety: Agate/Chalcedony

Granite (Phaneritic Igneous Rock (composed of Quartz, Feldspar, and Mica)) — igneous

Granite

Phaneritic Igneous Rock (composed of Quartz, Feldspar, and Mica)

Granite (Granite) — igneous

Granite

Granite

Granite (Weathered) (Granitic intrusive rock) — igneous

Granite (Weathered)

Granitic intrusive rock

Granite (Granite (compositionally of Quartz, Alkali Feldspar, and Plagioclase)) — igneous

Granite

Granite (compositionally of Quartz, Alkali Feldspar, and Plagioclase)

Basalt (Mafic volcanic rock (primarily plagioclase feldspar and pyroxene)) — igneous

Basalt

Mafic volcanic rock (primarily plagioclase feldspar and pyroxene)

Quartz-rich metamorphic rock, likely quartzite (Quartzite; predominantly microcrystalline quartz (SiO₂), possibly with mica or iron-oxide impurities) — metamorphic

Quartz-rich metamorphic rock, likely quartzite

Quartzite; predominantly microcrystalline quartz (SiO₂), possibly with mica or iron-oxide impurities

Quartz crystal cluster (Quartz, silicon dioxide (SiO₂); likely pale amethyst or iron-stained quartz) — mineral

Quartz crystal cluster

Quartz, silicon dioxide (SiO₂); likely pale amethyst or iron-stained quartz

Granite (Phaneritic Felsic Igneous Rock) — igneous

Granite

Phaneritic Felsic Igneous Rock

Diorite (River Cobble) (Intrusive Igneous Diorite) — igneous

Diorite (River Cobble)

Intrusive Igneous Diorite

Basalt (Mafic Volcanic Rock) — igneous

Basalt

Mafic Volcanic Rock

Granite with Quartz inclusion (Granite (Mainly SiO2, KAlSi3O8, NaAlSi3O8)) — igneous

Granite with Quartz inclusion

Granite (Mainly SiO2, KAlSi3O8, NaAlSi3O8)

Porphyritic Andesite (Andesite (with white Plagioclase phenocrysts)) — igneous

Porphyritic Andesite

Andesite (with white Plagioclase phenocrysts)

Water-worn black pebble, likely basalt (Basalt (fine-grained mafic volcanic rock; identification from the image is provisional)) — igneous

Water-worn black pebble, likely basalt

Basalt (fine-grained mafic volcanic rock; identification from the image is provisional)

Black Marble (Recrystallized Carbonate Rock (CaCO3)) — metamorphic

Black Marble

Recrystallized Carbonate Rock (CaCO3)

Gneissic Granite (Granite Gneiss) — metamorphic

Gneissic Granite

Granite Gneiss

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Diorite (or Gabbro/Gneiss stream pebble) (Diorite) — igneous

Diorite (or Gabbro/Gneiss stream pebble)

Diorite

Serpentine-rich metamorphic rock (probable serpentinite) (Serpentinite; chiefly serpentine-group minerals (antigorite, lizardite, or chrysotile), commonly with magnetite and chromite) — metamorphic

Serpentine-rich metamorphic rock (probable serpentinite)

Serpentinite; chiefly serpentine-group minerals (antigorite, lizardite, or chrysotile), commonly with magnetite and chromite

Banded Rhyolite (likely Green Jasper/Agate variety) (Silicon Dioxide (SiO2) with mineral inclusions) — igneous

Banded Rhyolite (likely Green Jasper/Agate variety)

Silicon Dioxide (SiO2) with mineral inclusions

Muscovite Mica (Golden/Yellow variety) (KAl2(AlSi3O10)(F,OH)2) — mineral

Muscovite Mica (Golden/Yellow variety)

KAl2(AlSi3O10)(F,OH)2

Granite (Granite (composed primarily of Quartz, Feldspar, and Mica/Amphibole)) — igneous

Granite

Granite (composed primarily of Quartz, Feldspar, and Mica/Amphibole)

Biotite (Black Mica) (Biotite - K(Mg,Fe)3(AlSi3O10)(OH)2) — mineral

Biotite (Black Mica)

Biotite - K(Mg,Fe)3(AlSi3O10)(OH)2

Clear quartz crystal (likely quartz fragment) (Quartz, silicon dioxide (SiO₂)) — mineral

Clear quartz crystal (likely quartz fragment)

Quartz, silicon dioxide (SiO₂)

Granite (Felsic Intrusive Igneous Rock) — igneous

Granite

Felsic Intrusive Igneous Rock

Granite (Felsic Intrusive Igneous Rock) — igneous

Granite

Felsic Intrusive Igneous Rock

Granite (Phaneritic Felsic Igneous Rock) — igneous

Granite

Phaneritic Felsic Igneous Rock

Granite (Phaneritic Igneous Rock (Granitic)) — igneous

Granite

Phaneritic Igneous Rock (Granitic)

Granite (Granite (Phaneritic igneous rock)) — igneous

Granite

Granite (Phaneritic igneous rock)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Quartz with Mica inclusions (likely Schist or Gneiss host) (Silicon Dioxide (SiO2) with Phyllosilicates (KAl2(AlSi3O10)(OH)2)) — metamorphic

Quartz with Mica inclusions (likely Schist or Gneiss host)

Silicon Dioxide (SiO2) with Phyllosilicates (KAl2(AlSi3O10)(OH)2)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)