Rock Identifier

Category

Sedimentary (Volcanic)

Browse sedimentary (volcanic) specimens identified by the Rock Identifier community.

Yellow Quartz Pebble (Quartz (Silicon Dioxide - SiO2)) — mineral

Yellow Quartz Pebble

Quartz (Silicon Dioxide - SiO2)

Amethyst Geode (Silicon Dioxide with impurities (SiO2)) — mineral

Amethyst Geode

Silicon Dioxide with impurities (SiO2)

Amethyst (Tumbled) (Silicon Dioxide (SiO2) with iron impurities) — mineral

Amethyst (Tumbled)

Silicon Dioxide (SiO2) with iron impurities

Prehnite (Prehnite - Ca2Al(AlSi3O10)(OH)2) — mineral

Prehnite

Prehnite - Ca2Al(AlSi3O10)(OH)2

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

Diorite (Salt and Pepper Rock)

Diorite

Greenstone (Metabasalt) — metamorphic

Greenstone

Metabasalt

Cinnabar in Quartz (Silicon Dioxide (Quartz, SiO2) with Mercury Sulfide inclusions (Cinnabar, HgS)) — mineral

Cinnabar in Quartz

Silicon Dioxide (Quartz, SiO2) with Mercury Sulfide inclusions (Cinnabar, HgS)

Diorite (Diorite) — igneous

Diorite

Diorite

Carnelian Agate (Silicon Dioxide (SiO2) with Hematite inclusions) — mineral

Carnelian Agate

Silicon Dioxide (SiO2) with Hematite inclusions

Carnelian Agate (Silicon Dioxide (SiO2) - Carnelian variety of Chalcedony) — Mineral

Carnelian Agate

Silicon Dioxide (SiO2) - Carnelian variety of Chalcedony

Diorite (Diorite (Intermediate Plutonic Rock)) — igneous

Diorite

Diorite (Intermediate Plutonic Rock)

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

Diorite (Salt and Pepper Rock)

Diorite

Yellow Diamond (Diamond (Carbon, C)) — mineral

Yellow Diamond

Diamond (Carbon, C)

Diorite (Diorite (an intrusive igneous rock)) — igneous

Diorite

Diorite (an intrusive igneous rock)

Pink Tourmaline (Rubellite) (Elbaite (Tourmaline group) - Na(Li,Al)3Al6(BO3)3Si6O18(OH)4) — mineral

Pink Tourmaline (Rubellite)

Elbaite (Tourmaline group) - Na(Li,Al)3Al6(BO3)3Si6O18(OH)4

Amethyst (Amethyst (Silicon Dioxide - SiO2)) — mineral

Amethyst

Amethyst (Silicon Dioxide - SiO2)

Gold Ore in Quartz/Matrix (Native Gold (Au) in Quartz (SiO2) matrix) — mineral

Gold Ore in Quartz/Matrix

Native Gold (Au) in Quartz (SiO2) matrix

Diorite (Diorite (Intermediate intrusive igneous rock)) — igneous

Diorite

Diorite (Intermediate intrusive igneous rock)

Yellow Quartz (Chalcedony/Citrine Pebble) (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz (Chalcedony/Citrine Pebble)

Silicon Dioxide (SiO2)

Tiffany Stone (Fluorite Opal (a complex mix of Fluorite, Opal, Calcite, Dolomite, Quartz, and Bertrandite)) — mineral

Tiffany Stone

Fluorite Opal (a complex mix of Fluorite, Opal, Calcite, Dolomite, Quartz, and Bertrandite)

Bloodstone (Heliotrope) (Silicon Dioxide (SiO2) with inclusions of Hematite) — mineral

Bloodstone (Heliotrope)

Silicon Dioxide (SiO2) with inclusions of Hematite

Banded Agate (often called Brown Agate or Chalcedony) (Silicon Dioxide (SiO2)) — mineral

Banded Agate (often called Brown Agate or Chalcedony)

Silicon Dioxide (SiO2)

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

Smoky Quartz Geode Cluster

Silicon Dioxide (SiO2)

Carnelian Agate (Silicon Dioxide (SiO2) - Variety of Chalcedony) — mineral

Carnelian Agate

Silicon Dioxide (SiO2) - Variety of Chalcedony

Sodalite (Sodalite (Sodium Aluminum Silicate Chloride), Na8(Al6Si6O24)Cl2) — Mineral

Sodalite

Sodalite (Sodium Aluminum Silicate Chloride), Na8(Al6Si6O24)Cl2

Diorite (Spotted or Dalmatian Stone effect) (Diorite (Intermediate Plutonic Rock)) — igneous

Diorite (Spotted or Dalmatian Stone effect)

Diorite (Intermediate Plutonic Rock)

Diorite (Intermediate plutonic igneous rock) — Igneous

Diorite

Intermediate plutonic igneous rock

Diorite (Diorite (plutonic igneous rock)) — igneous

Diorite

Diorite (plutonic igneous rock)

Basalt (Extrusive mafic igneous rock) — igneous

Basalt

Extrusive mafic igneous rock

Dalmation Jasper (Dalmation Stone) (Perthitic feldspar-quartz-amphibole rock) — igneous

Dalmation Jasper (Dalmation Stone)

Perthitic feldspar-quartz-amphibole rock

Diorite (Phaneritic intermediate plutonic rock) — igneous

Diorite

Phaneritic intermediate plutonic rock

Moss Agate (Silicon Dioxide with inclusions (SiO2 + Fe/Mn/Mg)) — mineral

Moss Agate

Silicon Dioxide with inclusions (SiO2 + Fe/Mn/Mg)

Limestone (specifically a Crushed Aggregate fragment) (Calcium Carbonate (CaCO3)) — sedimentary

Limestone (specifically a Crushed Aggregate fragment)

Calcium Carbonate (CaCO3)

Sandstone (Ferruginous) (Arenite (primarily SiO2 with Fe2O3 staining)) — sedimentary

Sandstone (Ferruginous)

Arenite (primarily SiO2 with Fe2O3 staining)

Sandstone (Quartz-rich) (Arenite (primarily SiO2)) — sedimentary

Sandstone (Quartz-rich)

Arenite (primarily SiO2)

Sandstone (likely Quartz Sandstone) (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone (likely Quartz Sandstone)

Arenite (composed primarily of SiO2)

Dalmation Stone (often called Dalmatian Jasper) (Peralkaline Rock (Microgranite/Aplite), SiO2 with inclusions of Arfvedsonite) — igneous

Dalmation Stone (often called Dalmatian Jasper)

Peralkaline Rock (Microgranite/Aplite), SiO2 with inclusions of Arfvedsonite

Sandstone (Arenite (SiO2 primarily)) — sedimentary

Sandstone

Arenite (SiO2 primarily)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Vesicular Basalt with Oxidation (Scoriaceous Olivine Basalt (Mafic volcanic rock)) — igneous

Vesicular Basalt with Oxidation

Scoriaceous Olivine Basalt (Mafic volcanic rock)

Basalt (Vesicular) (Mafic Volcanic Rock (rich in Magnesium and Iron)) — Igneous

Basalt (Vesicular)

Mafic Volcanic Rock (rich in Magnesium and Iron)

Basalt with Pahoehoe flow texture (Vesicular Basalt (Aphanitic Mafic Igneous Rock)) — igneous

Basalt with Pahoehoe flow texture

Vesicular Basalt (Aphanitic Mafic Igneous Rock)