Rock Identifier

Category

Rock (Likely Sedimentary)

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

Learn about Rock (Likely Sedimentary) in the encyclopedia

Asphalt Rock

Rock Gypsum

Conglomerate

Breccia

Ironstone

Limestone

Claystone

Phosphorite

Chert

Coal

Pisolite

Mudstone

Sandstone (Garden Boulder) (Sandstone (SiO2 dominated)) — sedimentary

Sandstone (Garden Boulder)

Sandstone (SiO2 dominated)

Pyrite-bearing quartz vein rock (Pyrite (FeS₂) in quartz, possibly with iron-oxide weathering products) — mineral

Pyrite-bearing quartz vein rock

Pyrite (FeS₂) in quartz, possibly with iron-oxide weathering products

Quartzite River Rock (Quartzite (primarily SiO2)) — metamorphic

Quartzite River Rock

Quartzite (primarily SiO2)

Chert (specifically a nodule with Chalcendony/Agate banding) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (specifically a nodule with Chalcendony/Agate banding)

Microcrystalline Quartz (SiO2)

Trace Fossil (Lichenandites or Rhynie Chert Chert with Microfossils) (Trace fossil in microcrystalline quartz (SiO2)) — fossil

Trace Fossil (Lichenandites or Rhynie Chert Chert with Microfossils)

Trace fossil in microcrystalline quartz (SiO2)

Chert (Jasper/Flint variety) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Jasper/Flint variety)

Silicon Dioxide (SiO2)

Mudstone (Argillite) — sedimentary

Mudstone

Argillite

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

Pink Granite

Phaneritic Felsic Igneous Rock (Granite)

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

Pink Granite

Phaneritic Plutonic Felsic Rock (Granite)

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

Diorite (River Pebble)

Diorite (Intermediate intrusive igneous rock)

Fossilized Shark Tooth (likely Sand Tiger Shark) (Carcharias taurus (fossilized hydroxyapatite/calcium phosphate)) — fossil

Fossilized Shark Tooth (likely Sand Tiger Shark)

Carcharias taurus (fossilized hydroxyapatite/calcium phosphate)

Green Jasper (Silicon Dioxide (SiO2) with iron silicate inclusions) — sedimentary

Green Jasper

Silicon Dioxide (SiO2) with iron silicate inclusions

Iron-Stained Quartz (Riverside Cobble) (Silicon Dioxide (SiO2) with Limonite/Hematite inclusions) — mineral

Iron-Stained Quartz (Riverside Cobble)

Silicon Dioxide (SiO2) with Limonite/Hematite inclusions

Veined quartz-bearing metamorphic rock (Likely quartzite or siliceous schist with iron-oxide staining) — metamorphic

Veined quartz-bearing metamorphic rock

Likely quartzite or siliceous schist with iron-oxide staining

Tumbled metamorphic pebble, likely gneiss (Foliated gneiss; commonly quartz, feldspar, mica, and amphibole) — metamorphic

Tumbled metamorphic pebble, likely gneiss

Foliated gneiss; commonly quartz, feldspar, mica, and amphibole

Quartz Pebble (Iron-stained) (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble (Iron-stained)

Silicon Dioxide (SiO2)

Chert with Druzy Quartz and Mossy/Iron Inclusions (Microcrystalline Quartz (SiO2)) — sedimentary

Chert with Druzy Quartz and Mossy/Iron Inclusions

Microcrystalline Quartz (SiO2)

Basalt with Quartz Vein (Basalt (SiO2 vein inclusion)) — igneous

Basalt with Quartz Vein

Basalt (SiO2 vein inclusion)

Granite Cobble (Granite (Phaneritic Quartz-Feldspar-Mica intrusive rock)) — igneous

Granite Cobble

Granite (Phaneritic Quartz-Feldspar-Mica intrusive rock)

Likely schist, possibly serpentinite (Mica schist; potential chlorite–serpentine-rich metamorphic rock) — metamorphic

Likely schist, possibly serpentinite

Mica schist; potential chlorite–serpentine-rich metamorphic rock

Sandstone (with man-made markings) (Arenite (composed primarily of Quartz, SiO2)) — sedimentary

Sandstone (with man-made markings)

Arenite (composed primarily of Quartz, SiO2)

Fossilized Shark Tooth (Otodus obliquus) (Otodus obliquus (composed primarily of Fluorapatite)) — mineral

Fossilized Shark Tooth (Otodus obliquus)

Otodus obliquus (composed primarily of Fluorapatite)

Veined basalt (likely basalt with quartz/calcite vein) (Basalt, aphanitic mafic volcanic rock; vein minerals likely quartz (SiO₂) or calcite (CaCO₃)) — igneous

Veined basalt (likely basalt with quartz/calcite vein)

Basalt, aphanitic mafic volcanic rock; vein minerals likely quartz (SiO₂) or calcite (CaCO₃)

Riverstone (likely Basalt or Greywacke) (Extrusive Magmatic Basalt) — igneous

Riverstone (likely Basalt or Greywacke)

Extrusive Magmatic Basalt

Basalt with Quartz Infill (Aphanitic Mafic Igneous Rock with Silica (SiO2) inclusion) — igneous

Basalt with Quartz Infill

Aphanitic Mafic Igneous Rock with Silica (SiO2) inclusion

Biotite granite pebble (Granite, chiefly quartz (SiO₂), feldspar, and biotite mica) — igneous

Biotite granite pebble

Granite, chiefly quartz (SiO₂), feldspar, and biotite mica

Chert (specifically Jasper/Agate variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (specifically Jasper/Agate variety)

Microcrystalline Quartz (SiO2)

Vesicular Rhyolite with inclusions (Felsic extrusive igneous rock (Rhyolite)) — igneous

Vesicular Rhyolite with inclusions

Felsic extrusive igneous rock (Rhyolite)

Fossil Snail (Gastropoda fossil) — fossil

Fossil Snail

Gastropoda fossil

Granite (Felsic intrusive igneous rock) — igneous

Granite

Felsic intrusive igneous rock

Sandstone Pebble (Sandstone (primarily SiO2)) — sedimentary

Sandstone Pebble

Sandstone (primarily SiO2)

Quartz Geode (Silicon Dioxide (SiO2) within a sedimentary or igneous host) — sedimentary

Quartz Geode

Silicon Dioxide (SiO2) within a sedimentary or igneous host

River Pebble (Grantoid/Quartzite) (Quartz-rich igneous rock (Granitoid)) — igneous

River Pebble (Grantoid/Quartzite)

Quartz-rich igneous rock (Granitoid)

Granite (Granite (Phaneritic Acidic Igneous Rock)) — igneous

Granite

Granite (Phaneritic Acidic Igneous Rock)

Milky quartz (Quartz (silicon dioxide, SiO₂)) — mineral

Milky quartz

Quartz (silicon dioxide, SiO₂)

Weathered dark rock fragment (Indeterminate; possibly basalt or iron-rich volcanic rock) — igneous

Weathered dark rock fragment

Indeterminate; possibly basalt or iron-rich volcanic rock

Tumbled basalt (likely) (Basalt; fine-grained mafic volcanic rock composed mainly of plagioclase feldspar and pyroxene, often with minor olivine and iron oxides) — igneous

Tumbled basalt (likely)

Basalt; fine-grained mafic volcanic rock composed mainly of plagioclase feldspar and pyroxene, often with minor olivine and iron oxides

Banded Chert (Cryptocrystalline Quartz (SiO2)) — sedimentary

Banded Chert

Cryptocrystalline Quartz (SiO2)

Polished brown flint/chert (likely) (Microcrystalline quartz, SiO₂ (chalcedonic flint/chert)) — sedimentary

Polished brown flint/chert (likely)

Microcrystalline quartz, SiO₂ (chalcedonic flint/chert)

Dark weathered pebble, likely basalt (Basalt (fine-grained mafic volcanic rock; typically plagioclase, pyroxene, and olivine)) — igneous

Dark weathered pebble, likely basalt

Basalt (fine-grained mafic volcanic rock; typically plagioclase, pyroxene, and olivine)

Geode (Quartz / Chalcedony nodule) — sedimentary

Geode

Quartz / Chalcedony nodule

Lapis lazuli and green-blue chalcedony jewelry (Lapis lazuli: lazurite-bearing metamorphic rock, chiefly lazurite (Na₃Ca(Al₃Si₃O₁₂)S) with calcite and pyrite; second stone: likely chrysoprase or green-blue chalcedony (microcrystalline quartz, SiO₂)) — gemstone

Lapis lazuli and green-blue chalcedony jewelry

Lapis lazuli: lazurite-bearing metamorphic rock, chiefly lazurite (Na₃Ca(Al₃Si₃O₁₂)S) with calcite and pyrite; second stone: likely chrysoprase or green-blue chalcedony (microcrystalline quartz, SiO₂)