Rock Identifier

Category

Mixed (Igneous, Sedimentary, Metamorphic, And Minerals)

Browse mixed (igneous, sedimentary, metamorphic, and minerals) specimens identified by the Rock Identifier community.

Quartz (Milky/Iron-stained) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky/Iron-stained)

Silicon Dioxide (SiO2)

Botryoidal Agate (Chalcedony (Silicon Dioxide, SiO2)) — mineral

Botryoidal Agate

Chalcedony (Silicon Dioxide, SiO2)

Shale (with minor calcite veining) (Clastic sedimentary rock (primarily clay minerals and quartz)) — sedimentary

Shale (with minor calcite veining)

Clastic sedimentary rock (primarily clay minerals and quartz)

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

Quartz (Tumbled)

Silicon Dioxide (SiO2)

Smoky Quartz Geode Slice (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz Geode Slice

Silicon Dioxide (SiO2)

Chert (Mudstone) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Mudstone)

Microcrystalline Quartz (SiO2)

Chert (often called Flint) (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (often called Flint)

Cryptocrystalline Quartz (SiO2)

Chert (Flint) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Flint)

Silicon Dioxide (SiO2)

Chert (Flint) with Glauconite (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Flint) with Glauconite

Microcrystalline Quartz (SiO2)

Olivine-bearing Basalt / Scoria (Mafic Igneous Rock (primarily (Mg, Fe)2SiO4)) — igneous

Olivine-bearing Basalt / Scoria

Mafic Igneous Rock (primarily (Mg, Fe)2SiO4)

Diorite (Diorite (intermediate intrusive igneous rock)) — igneous

Diorite

Diorite (intermediate intrusive igneous rock)

Indigo Gabbro (Gabbro (composed of plagioclase feldspar, pyroxene, and olivine)) — igneous

Indigo Gabbro

Gabbro (composed of plagioclase feldspar, pyroxene, and olivine)

Granite (Granite (High-silica plutonic rock)) — Igneous

Granite

Granite (High-silica plutonic rock)

Pink Granite (Phaneritic Felsic Igneous Rock (Granite)) — igneous

Pink Granite

Phaneritic Felsic Igneous Rock (Granite)

Red Quartz (Carnelian/Red Jasper Agate) (Silicon Dioxide (SiO2) with Iron Oxide inclusions) — mineral

Red Quartz (Carnelian/Red Jasper Agate)

Silicon Dioxide (SiO2) with Iron Oxide inclusions

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

Granite

Granite (a common igneous rock)

Diorite (Intermediate plutonic igneous rock) — Igneous

Diorite

Intermediate plutonic igneous rock

Yellow Ochre / Limonite (Limonite (FeO(OH)·nH2O)) — Mineral

Yellow Ochre / Limonite

Limonite (FeO(OH)·nH2O)

Amethyst with Marcasite accents (Amethyst (Silicon Dioxide SiO2) and Marcasite (Iron Sulfide FeS2)) — mineral

Amethyst with Marcasite accents

Amethyst (Silicon Dioxide SiO2) and Marcasite (Iron Sulfide FeS2)

Prehnite (Prehnite (Ca2Al2Si3O10(OH)2)) — mineral

Prehnite

Prehnite (Ca2Al2Si3O10(OH)2)

Shale (Shale (Sedimentary rock composed of mud/clay minerals)) — sedimentary

Shale

Shale (Sedimentary rock composed of mud/clay minerals)

Phyllite (Phyllite (Foliated metamorphic rock)) — metamorphic

Phyllite

Phyllite (Foliated metamorphic rock)

Granitic Pegmatite with Schorl (Granitic Pegmatite (NaAlSi3O8, KAlSi3O8, SiO2) with Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)) — igneous

Granitic Pegmatite with Schorl

Granitic Pegmatite (NaAlSi3O8, KAlSi3O8, SiO2) with Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)

Vesicular Basalt (or Scoria) (Vesicular Basalt (Aphanitic-vesicular volcanic rock)) — igneous

Vesicular Basalt (or Scoria)

Vesicular Basalt (Aphanitic-vesicular volcanic rock)

Lapis Lazuli (Lazurite-dominant rock, (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2) — metamorphic

Lapis Lazuli

Lazurite-dominant rock, (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Ferruginous Quartz (Iron-stained Quartz) (Silicon Dioxide (SiO2) with Iron Oxide inclusions (Fe2O3)) — mineral

Ferruginous Quartz (Iron-stained Quartz)

Silicon Dioxide (SiO2) with Iron Oxide inclusions (Fe2O3)

Chalcedony (Agate) (Cryptocrystalline Quartz (SiO2)) — mineral

Chalcedony (Agate)

Cryptocrystalline Quartz (SiO2)

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

Hematite

Iron(III) oxide (Fe2O3)

White Agate (Chalcedony) (Agate (Silicon Dioxide - SiO2)) — mineral

White Agate (Chalcedony)

Agate (Silicon Dioxide - SiO2)

Banded Agate (Pink Chalcedony) (Silicon Dioxide (SiO2) - Cryptocrystalline Quartz) — mineral

Banded Agate (Pink Chalcedony)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

White Quartz Pebbles (Quartz (Silicon Dioxide, SiO2)) — Mineral

White Quartz Pebbles

Quartz (Silicon Dioxide, SiO2)

Carnelian Agate (Carnelian (SiO2 with iron oxide impurities)) — mineral

Carnelian Agate

Carnelian (SiO2 with iron oxide impurities)

Chert (Common Opal variant) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Common Opal variant)

Silicon Dioxide (SiO2)

Chert (specifically Yellow/Honey Jasper variety) (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (specifically Yellow/Honey Jasper variety)

Cryptocrystalline Quartz (SiO2)

Brown Jasper (Silicon Dioxide (SiO2)) — sedimentary

Brown Jasper

Silicon Dioxide (SiO2)

Ironstone (Limonitic Concretion) (Limonite (FeO(OH)·nH2O) with Goethite and Hematite inclusions) — sedimentary

Ironstone (Limonitic Concretion)

Limonite (FeO(OH)·nH2O) with Goethite and Hematite inclusions

Marble (Recrystallized Calcite (CaCO3)) — metamorphic

Marble

Recrystallized Calcite (CaCO3)

Amygdaloidal Basalt (Amygdaloidal Basalt (Mafic volcanic rock)) — igneous

Amygdaloidal Basalt

Amygdaloidal Basalt (Mafic volcanic rock)

Amygdaloidal Rhyolite (Amygdaloidal Rhyolite (Felsic volcanic rock)) — igneous

Amygdaloidal Rhyolite

Amygdaloidal Rhyolite (Felsic volcanic rock)

Basalt with Limonite stains (Extrusive mafic igneous rock; Limonite (FeO(OH)·nH2O)) — igneous

Basalt with Limonite stains

Extrusive mafic igneous rock; Limonite (FeO(OH)·nH2O)

Obsidian (Volcanic Glass (SiO2 rich)) — Igneous

Obsidian

Volcanic Glass (SiO2 rich)