Rock Identifier

Category

Igneous (Anthropogenic)

Browse igneous (anthropogenic) specimens identified by the Rock Identifier community.

Diorite (Salt and Pepper Rock) (Diorite) — igneous

Diorite (Salt and Pepper Rock)

Diorite

Dalmation Stone (Dalmation Jasper) (Peralkaline rock (primarily Feldspar and Quartz with Arfvedsonite spots)) — igneous

Dalmation Stone (Dalmation Jasper)

Peralkaline rock (primarily Feldspar and Quartz with Arfvedsonite spots)

Granite (Granite) — igneous

Granite

Granite

Granite (Granite (Felsic Plutonic Rock)) — igneous

Granite

Granite (Felsic Plutonic Rock)

Aventurine (likely Green Aventurine) (Silicon Dioxide (SiO2) with mineral inclusions) — Mineral/Mineraloid within a rock matrix

Aventurine (likely Green Aventurine)

Silicon Dioxide (SiO2) with mineral inclusions

Mineral/Mineraloid within a rock matrix

Felsic Igneous Rock (likely Rhyolite or weathered Granite) (Felsic Volcanic/Plutonic Rock) — igneous

Felsic Igneous Rock (likely Rhyolite or weathered Granite)

Felsic Volcanic/Plutonic Rock

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)

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

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

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

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)

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

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Natural Gemstone Cabochons (Ruby, Moonstone, Emerald, Citrine) (Ruby (Al2O3:Cr), Moonstone (KAlSi3O8), Emerald (Be3Al2(SiO3)6:Cr), Citrine (SiO2)) — mineral

Natural Gemstone Cabochons (Ruby, Moonstone, Emerald, Citrine)

Ruby (Al2O3:Cr), Moonstone (KAlSi3O8), Emerald (Be3Al2(SiO3)6:Cr), Citrine (SiO2)

Porphyry (likely Porphyritic Andesite or Basalt) (Porphyritic Igneous Rock) — igneous

Porphyry (likely Porphyritic Andesite or Basalt)

Porphyritic Igneous Rock

Basalt (Mafic Igneous Rock) — igneous

Basalt

Mafic Igneous Rock

Basalt (Mafic Igneous Rock) — igneous

Basalt

Mafic Igneous Rock

Basalt (Mafic Igneous Basalt) — igneous

Basalt

Mafic Igneous Basalt

Basalt (Mafic Igneous Rock) — igneous

Basalt

Mafic Igneous Rock

Basalt (Mafic Igneous Rock) — igneous

Basalt

Mafic Igneous Rock

Basalt River Stone (Basaltic Igneous Rock) — igneous

Basalt River Stone

Basaltic Igneous Rock

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

Granite

Phaneritic plutonic rock (SiO2 range 65-75%)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

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)

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

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

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

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

Quartz (Iron-Stained)

Silicon Dioxide (SiO2)

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

Dalmation Stone

Peralkaline Rock (SiO2 with Arfvedsonite)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Granite (Granite (Mainly Quartz SiO2 and Feldspar KAlSi3O8)) — igneous

Granite

Granite (Mainly Quartz SiO2 and Feldspar KAlSi3O8)

Mahogany Obsidian (Volcanic Glass with Hematite or Magnetite inclusions (SiO2 + Fe2O3)) — igneous

Mahogany Obsidian

Volcanic Glass with Hematite or Magnetite inclusions (SiO2 + Fe2O3)

Granite (Phaneritic Felsic Intrusive Rock) — igneous

Granite

Phaneritic Felsic Intrusive Rock

Terracotta (Man-made ceramic brick fragment) (Baked clay / High-iron ceramic (Silicate-based ceramic)) — Anthropogenic material (Man-made sedimentary mimic)

Terracotta (Man-made ceramic brick fragment)

Baked clay / High-iron ceramic (Silicate-based ceramic)

Anthropogenic material (Man-made sedimentary mimic)

Granite (Granite (a plutonic rock)) — Igneous

Granite

Granite (a plutonic rock)

Aquamarine (Beryl (Be3Al2Si6O18 with Fe2+ impurities)) — mineral

Aquamarine

Beryl (Be3Al2Si6O18 with Fe2+ impurities)

Quartz in Basalt (Xenocryst) (Silicon Dioxide (SiO2) in Mafic Igneous Volcanic Rock) — Igneous

Quartz in Basalt (Xenocryst)

Silicon Dioxide (SiO2) in Mafic Igneous Volcanic Rock

Hypersthene (Hypersthene ((Mg,Fe)SiO₃)) — Mineral

Hypersthene

Hypersthene ((Mg,Fe)SiO₃)

Magnetite (Iron Ore) (Magnetite (Fe3O4)) — mineral

Magnetite (Iron Ore)

Magnetite (Fe3O4)

Granite Pebble (Granite (a plutonic igneous rock composed primarily of quartz, feldspar, and mica/amphibole)) — igneous

Granite Pebble

Granite (a plutonic igneous rock composed primarily of quartz, feldspar, and mica/amphibole)

Dalmatian Stone (often misnamed Dalmatian Jasper) (Aplite (with hornblende/arfvedsonite inclusions)) — igneous

Dalmatian Stone (often misnamed Dalmatian Jasper)

Aplite (with hornblende/arfvedsonite inclusions)