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.

Quartzite Pebble (Yellow/Cloudy Quartz) (Silicon Dioxide (SiO2) - Recrystallized Sandstone) — metamorphic

Quartzite Pebble (Yellow/Cloudy Quartz)

Silicon Dioxide (SiO2) - Recrystallized Sandstone

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

Chert (and Flint)

Silicon Dioxide (SiO2)

Chert Nodule (Chert (SiO2)) — sedimentary

Chert Nodule

Chert (SiO2)

Geode (Unopened) (Silica-rich concretion (SiO2)) — sedimentary

Geode (Unopened)

Silica-rich concretion (SiO2)

Shale (Fissile mudrock (composed primarily of clay minerals and quartz)) — sedimentary

Shale

Fissile mudrock (composed primarily of clay minerals and quartz)

Quartzite Pebbler (Quartzite (SiO2)) — metamorphic

Quartzite Pebbler

Quartzite (SiO2)

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Pebble (river rock/beach pebble) (Pebble (clast size class)) — Sedimentary Rock

Pebble (river rock/beach pebble)

Pebble (clast size class)

Sedimentary Rock

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

Flint (or Chert)

Cryptocrystalline Quartz (SiO2)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

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

Chert (Jasper variety)

Silicon Dioxide (SiO2)

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

Clear Quartz Crystal

Quartz (Silicon Dioxide, SiO2)

Chert / Flint Nodules (Chert (Cryptocrystalline variety of Quartz, SiO2)) — sedimentary

Chert / Flint Nodules

Chert (Cryptocrystalline variety of Quartz, SiO2)

Red Jasper with Quartz and Hematite (Silicon Dioxide (SiO2) with Ferric Iron inclusions) — sedimentary

Red Jasper with Quartz and Hematite

Silicon Dioxide (SiO2) with Ferric Iron inclusions

Blue Chalcedony (Silicon Dioxide (SiO2)) — mineral

Blue Chalcedony

Silicon Dioxide (SiO2)

Quartz Geode (Citrine or Iron-stained Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz Geode (Citrine or Iron-stained Quartz)

Silicon Dioxide (SiO2)

Yellow Jasper (Silicon Dioxide (SiO2) with iron oxide impurities) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide impurities

Chert (Nodule) (Crystalline Silicon Dioxide (SiO2)) — sedimentary

Chert (Nodule)

Crystalline Silicon Dioxide (SiO2)

Banded Iron Formation (BIF) (Banded Iron Formation (predominantly Hematite Fe2O3 and magnetite Fe3O4 alternating with Chert SiO2)) — sedimentary

Banded Iron Formation (BIF)

Banded Iron Formation (predominantly Hematite Fe2O3 and magnetite Fe3O4 alternating with Chert SiO2)

Banded Iron Formation (BIF) (Banded Iron Formation (Magnetite-Hematite-Chert)) — sedimentary

Banded Iron Formation (BIF)

Banded Iron Formation (Magnetite-Hematite-Chert)

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

Flint (Chert)

Cryptocrystalline Quartz (SiO2)

Jasper (Iron-stained Quartz) (Silicon Dioxide (SiO2) with iron oxide inclusions) — sedimentary

Jasper (Iron-stained Quartz)

Silicon Dioxide (SiO2) with iron oxide inclusions

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

Ferruginous Quartz

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

Sandstone (Quartzite-rich) (Clastic sedimentary rock (SiO2 primary)) — sedimentary

Sandstone (Quartzite-rich)

Clastic sedimentary rock (SiO2 primary)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Chert (specifically Chalcedony/Flint variant) (Silicon Dioxide (SiO2)) — sedimentary

Chert (specifically Chalcedony/Flint variant)

Silicon Dioxide (SiO2)

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

Sandstone (with man-made markings)

Arenite (composed primarily of Quartz, SiO2)

Labradorite (Larvikite variety) (Ternary feldspar (Anorthoclase), (Na,K)AlSi3O8) — igneous

Labradorite (Larvikite variety)

Ternary feldspar (Anorthoclase), (Na,K)AlSi3O8

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

Chert (Jasper/Mudstone)

Silicon Dioxide (SiO2)

Agate (Polished Nodule) (Agate (Silicon Dioxide, SiO2)) — mineral

Agate (Polished Nodule)

Agate (Silicon Dioxide, SiO2)

Jasper (Iron-stained Quartz) (Silicon dioxide (SiO2) with iron oxide inclusions) — sedimentary

Jasper (Iron-stained Quartz)

Silicon dioxide (SiO2) with iron oxide inclusions

Dalmatian Jasper / Dalmatian Stone (Peralkaline Rock (Silicon Dioxide with Amphibole inclusions)) — igneous

Dalmatian Jasper / Dalmatian Stone

Peralkaline Rock (Silicon Dioxide with Amphibole inclusions)

Chert (Nodule) (Cryptocrystalline Silica (SiO2)) — sedimentary

Chert (Nodule)

Cryptocrystalline Silica (SiO2)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Chert (specifically Chert Nodule/Flint) (Chert (Silicon Dioxide, SiO2)) — sedimentary

Chert (specifically Chert Nodule/Flint)

Chert (Silicon Dioxide, SiO2)

Milky Quartz (Quartz (Silica / Silicon Dioxide), SiO2) — mineral

Milky Quartz

Quartz (Silica / Silicon Dioxide), SiO2

Dendritic Agate or Manganese Nodule in Chert/Limestone (Silicon Dioxide (SiO2) with Manganese Oxide (MnO2) inclusions) — sedimentary

Dendritic Agate or Manganese Nodule in Chert/Limestone

Silicon Dioxide (SiO2) with Manganese Oxide (MnO2) inclusions

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

Indigo Gabbro

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

Quartz (likely a form of massive or vein quartz) (Quartz (SiO₂)) — Mineral

Quartz (likely a form of massive or vein quartz)

Quartz (SiO₂)

Quartzite (Quartzite (mainly SiO2)) — metamorphic

Quartzite

Quartzite (mainly SiO2)

Chert (specifically Flint or Dark Chert) (Chert (SiO2)) — sedimentary

Chert (specifically Flint or Dark Chert)

Chert (SiO2)