Rock Identifier

Category

Sedimentary Or Metamorphic (Base Substrate)

Browse sedimentary or metamorphic (base substrate) specimens identified by the Rock Identifier community.

Feldspar (specifically Orthoclase) (Potassium Aluminum Silicate (KAlSi3O8)) — mineral

Feldspar (specifically Orthoclase)

Potassium Aluminum Silicate (KAlSi3O8)

Quartz pebble (Silicon Dioxide (SiO2)) — mineral

Quartz pebble

Silicon Dioxide (SiO2)

Asphalt (Road Aggregate) (Bituminous Conglomerate / Asphalt Concrete) — Anthropogenic (Man-made)

Asphalt (Road Aggregate)

Bituminous Conglomerate / Asphalt Concrete

Anthropogenic (Man-made)

Hematite (Hematite (Fe2O3)) — mineral

Hematite

Hematite (Fe2O3)

Peridotite (Peridotite (primarily Olivine and Pyroxene)) — igneous

Peridotite

Peridotite (primarily Olivine and Pyroxene)

Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

Basalt (Basalt (Aphanitic Mafic Igneous Rock)) — igneous

Basalt

Basalt (Aphanitic Mafic Igneous Rock)

Heat-Treated Citrine (Amethyst Geode Fragment) (Silicon Dioxide (SiO2) with iron impurities) — mineral

Heat-Treated Citrine (Amethyst Geode Fragment)

Silicon Dioxide (SiO2) with iron impurities

Rough Diamond (Diamond (pure Carbon, C)) — mineral

Rough Diamond

Diamond (pure Carbon, C)

Bloodstone (Heliotrope (Chalcedony)) — mineral

Bloodstone

Heliotrope (Chalcedony)

Labradorite ((Ca, Na)(Al, Si)4O8 (Calcium Sodium Aluminum Silicate)) — mineral

Labradorite

(Ca, Na)(Al, Si)4O8 (Calcium Sodium Aluminum Silicate)

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

Bloodstone (Heliotrope)

Silicon Dioxide (SiO2) with inclusions of Iron Oxide

Mahogany Obsidian (Volcanic Glass with Hematite/Magnetite inclusions (SiO2)) — igneous

Mahogany Obsidian

Volcanic Glass with Hematite/Magnetite inclusions (SiO2)

Porfido (Porphyritic Rock) (Porphyry (often Rhyolitic or Andesitic)) — igneous

Porfido (Porphyritic Rock)

Porphyry (often Rhyolitic or Andesitic)

Citrine Quartz (Silicon Dioxide (SiO2)) — mineral

Citrine Quartz

Silicon Dioxide (SiO2)

Jadeite and Assorted Corundum (Ruby/Sapphire) / Beryl (Emerald) (Jadeite (NaAlSi2O6), Ruby/Sapphire (Al2O3), Emerald (Be3Al2(SiO3)6)) — mineral

Jadeite and Assorted Corundum (Ruby/Sapphire) / Beryl (Emerald)

Jadeite (NaAlSi2O6), Ruby/Sapphire (Al2O3), Emerald (Be3Al2(SiO3)6)

Granite (Phaneritic Plutonic Felsic Rock (K-Feldspar + Quartz + Plagioclase)) — igneous

Granite

Phaneritic Plutonic Felsic Rock (K-Feldspar + Quartz + Plagioclase)

Dendritic Agate (Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions) — mineral

Dendritic Agate

Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions

Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

Shale or Argillite (Shale (fine-grained clastic sedimentary rock) or Argillite (low-grade metamorphic rock derived from shale)) — Sedimentary or Metamorphic (low grade)

Shale or Argillite

Shale (fine-grained clastic sedimentary rock) or Argillite (low-grade metamorphic rock derived from shale)

Sedimentary or Metamorphic (low grade)

Basalt (with Brass Inlay) (Basalt (Mafic volcanic rock)) — igneous

Basalt (with Brass Inlay)

Basalt (Mafic volcanic rock)

Sodalite (Na8(Al6Si6O24)Cl2 (Sodium Aluminum Silicate Chloride)) — mineral

Sodalite

Na8(Al6Si6O24)Cl2 (Sodium Aluminum Silicate Chloride)

Green Aventurine (SiO2) — mineral

Green Aventurine

SiO2

Rhodonite (Manganese Inosilicate (MnSiO3), often with Ca, Fe, Mg, Zn) — Mineral

Rhodonite

Manganese Inosilicate (MnSiO3), often with Ca, Fe, Mg, Zn

Pyrite (Pyrite (Iron Disulfide), FeS2) — Mineral

Pyrite

Pyrite (Iron Disulfide), FeS2

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

Granite

Granite (composed of Quartz, Feldspar, and Mica)

Granite (Worn Pebble) (Granite) — igneous

Granite (Worn Pebble)

Granite

Basalt (Basalt) — igneous

Basalt

Basalt

Basalt (Aphanitic Mafic Igneous Rock) — igneous

Basalt

Aphanitic Mafic Igneous Rock

Vesicular Basalt (Basalt) — igneous

Vesicular Basalt

Basalt

Basalt (with Porphyritic or Amygdaloidal features) (Mafic Volcanic Rock (Basalt)) — igneous

Basalt (with Porphyritic or Amygdaloidal features)

Mafic Volcanic Rock (Basalt)

Basalt (Basalt (composition primarily Plagioclase Feldspar and Pyroxene)) — igneous

Basalt

Basalt (composition primarily Plagioclase Feldspar and Pyroxene)

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

Basalt (River Stone)

Extrusive mafic igneous rock

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Basalt (Basalt) — igneous

Basalt

Basalt

Basalt (Basalt (Aphanitic Mafic Igneous)) — igneous

Basalt

Basalt (Aphanitic Mafic Igneous)

Pink Granite (Phaneritic intrusive igneous rock (high Potassium-Feldspar)) — igneous

Pink Granite

Phaneritic intrusive igneous rock (high Potassium-Feldspar)

Basalt Pebble (Extrusive mafic igneous rock) — igneous

Basalt Pebble

Extrusive mafic igneous rock

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

Vesicular Basalt (Amygdaloidal)

Amygdaloidal Basalt (Mafic volcanic rock)

Pink Granite (Granite (Phaneritic igneous rock)) — igneous

Pink Granite

Granite (Phaneritic igneous rock)

Amygdaloidal Basalt (Amygdaloidal Basalt (Mafic volcanic rock with secondary mineral fillings)) — igneous

Amygdaloidal Basalt

Amygdaloidal Basalt (Mafic volcanic rock with secondary mineral fillings)

Basalt (Vesicular) (Extrusive mafic igneous rock) — igneous

Basalt (Vesicular)

Extrusive mafic igneous rock