Rock Identifier

Category

Sedimentary Rock (Technically Chert, A Microcrystalline Quartz)

Browse sedimentary rock (technically chert, a microcrystalline quartz) specimens identified by the Rock Identifier community.

Learn about Sedimentary Rock (Technically Chert, A Microcrystalline Quartz) in the encyclopedia

Chert

Chert

Quartz Schist

Quartz Schist

Clear Quartz

Clear Quartz

Tourmalinated Quartz

Tourmalinated Quartz

Rutilated Quartz

Rutilated Quartz

Asphalt Rock

Asphalt Rock

Rock Gypsum

Rock Gypsum

Quartz-mica Schist

Quartz-mica Schist

Porcelanite

Porcelanite

Radiolarite

Radiolarite

Flint

Flint

Breccia

Breccia

Ferruginous Quartz (Silicon Dioxide (SiO2) with Hematite/Limonite impurities) — mineral

Ferruginous Quartz

Silicon Dioxide (SiO2) with Hematite/Limonite impurities

Agate Geode (Cryptocrystalline Quartz (SiO2) with Chalcedony banding) — mineral

Agate Geode

Cryptocrystalline Quartz (SiO2) with Chalcedony banding

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

River Rock (River Cobbles) (Fluvial Conglomerate Clasts (primarily composed of various minerals such as Quartz, SiO2)) — sedimentary

River Rock (River Cobbles)

Fluvial Conglomerate Clasts (primarily composed of various minerals such as Quartz, SiO2)

Banded Agate (Microcrystalline Quartz (SiO2) with impurities) — mineral

Banded Agate

Microcrystalline Quartz (SiO2) with impurities

Quartzite Pebble (Metamorphosed Sandstone (SiO2)) — metamorphic

Quartzite Pebble

Metamorphosed Sandstone (SiO2)

Chert (Flint nodule) (Chert (SiO2)) — sedimentary

Chert (Flint nodule)

Chert (SiO2)

Amygdaloidal Basalt with Quartz Infill (Basalt (SiO2 for the quartz inclusion)) — igneous

Amygdaloidal Basalt with Quartz Infill

Basalt (SiO2 for the quartz inclusion)

Quartzite (Quartzite (primarily Silicon Dioxide, SiO2)) — metamorphic

Quartzite

Quartzite (primarily Silicon Dioxide, SiO2)

Chert (often called Flint when dark) (Chert (Microcrystalline or Cryptocrystalline Silica, SiO2)) — sedimentary

Chert (often called Flint when dark)

Chert (Microcrystalline or Cryptocrystalline Silica, SiO2)

Sandstone (Pebble/Cobble) (Sandstone (arenite is a more precise term for sandstone with less than 15% matrix; this specimen appears to be a lithic or quartz arenite)) — Sedimentary

Sandstone (Pebble/Cobble)

Sandstone (arenite is a more precise term for sandstone with less than 15% matrix; this specimen appears to be a lithic or quartz arenite)

Clear Quartz (Rock Crystal) (Quartz (Silicon Dioxide, SiO2)) — mineral

Clear Quartz (Rock Crystal)

Quartz (Silicon Dioxide, SiO2)

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

Chert (Pebble)

Silicon Dioxide (SiO2)

Chert (Jasper/Mudstone) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Jasper/Mudstone)

Silicon Dioxide (SiO2)

Quartz Vein in Host Rock (clastic sediment) (Silicon Dioxide (SiO2) in matrix) — sedimentary

Quartz Vein in Host Rock (clastic sediment)

Silicon Dioxide (SiO2) in matrix

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Dyed Purple Agate Sliced (Silicon Dioxide (SiO2) with artificial pigment) — mineral

Dyed Purple Agate Sliced

Silicon Dioxide (SiO2) with artificial pigment

Porphyritic Basalt (Flowerstone) (Porphyritic Basalt (Mafic volcanic rock)) — igneous

Porphyritic Basalt (Flowerstone)

Porphyritic Basalt (Mafic volcanic rock)

Quartzite Pebble (Quartzite (SiO2)) — metamorphic

Quartzite Pebble

Quartzite (SiO2)

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

Chert / Flint

SiO2 (Silicon Dioxide)

Quartzite (Quartz-rich Cobble) (Quartzite (SiO2)) — metamorphic

Quartzite (Quartz-rich Cobble)

Quartzite (SiO2)

Dragon Blood Jasper (Epidote with Pietersite or Red Jasper (Ca2Al2Fe3+[Si2O7][SiO4]O(OH))) — metamorphic

Dragon Blood Jasper

Epidote with Pietersite or Red Jasper (Ca2Al2Fe3+[Si2O7][SiO4]O(OH))

Shale (Argillaceous Sedimentary Rock) — sedimentary

Shale

Argillaceous Sedimentary Rock

Sandstone (Clastic Sedimentary Rock (composed mostly of SiO2)) — sedimentary

Sandstone

Clastic Sedimentary Rock (composed mostly of SiO2)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

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

Chert (Flint)

Silicon Dioxide (SiO2)

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

Banded Flint (Chert)

Silicon Dioxide (SiO2)

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

Chert (Flint)

Cryptocrystalline Quartz (SiO2)

Chert (Iron-stained) (Chert / Microcrystalline Silicon Dioxide (SiO2)) — sedimentary

Chert (Iron-stained)

Chert / Microcrystalline Silicon Dioxide (SiO2)

Chert (variations include Flint or Jasper) (Chert (SiO2)) — sedimentary

Chert (variations include Flint or Jasper)

Chert (SiO2)

Jasper (Silicon Dioxide (SiO2)) — mineral

Jasper

Silicon Dioxide (SiO2)

Chert (Green Chert or Jasper) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Green Chert or Jasper)

Silicon Dioxide (SiO2)

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

Chert (Flint)

Silicon Dioxide (SiO2)

Vuggy Quartz on Matrix (Crystalline Silicon Dioxide (SiO2)) — mineral

Vuggy Quartz on Matrix

Crystalline Silicon Dioxide (SiO2)

Black Obsidian with white veins (Volcanic Glass (70–75% SiO2)) — igneous

Black Obsidian with white veins

Volcanic Glass (70–75% SiO2)

Quartzite Pebble (Quartzite (SiO2)) — metamorphic

Quartzite Pebble

Quartzite (SiO2)

Quartzite (Quartzite (mostly SiO2)) — metamorphic

Quartzite

Quartzite (mostly SiO2)

Clear Quartz (Rock Crystal) (Silicon Dioxide (SiO2)) — mineral

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Sandstone Concretion (Sedimentary concretion) — Sedimentary

Sandstone Concretion

Sedimentary concretion

Petrified Wood (Silicified Wood (SiO2)) — metamorphic

Petrified Wood

Silicified Wood (SiO2)

Sandstone (with Iron Staining) (Clastic Sedimentary Rock (primarily Quartz, SiO2)) — sedimentary

Sandstone (with Iron Staining)

Clastic Sedimentary Rock (primarily Quartz, SiO2)