Rock Identifier

Category

Sedimentary (Secondary Classification: Cryptocrystalline Quartz)

Browse sedimentary (secondary classification: cryptocrystalline quartz) specimens identified by the Rock Identifier community.

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

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

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Orbicular Jasper (Ocean Jasper or Poppy Jasper variant) (Silicon Dioxide (SiO2) with various inclusions) — sedimentary

Orbicular Jasper (Ocean Jasper or Poppy Jasper variant)

Silicon Dioxide (SiO2) with various inclusions

Agate with Druzy Quartz (Silicon Dioxide (SiO2)) — mineral

Agate with Druzy Quartz

Silicon Dioxide (SiO2)

Banded Chert (or Flint) (Microcrystalline Quartz (SiO2)) — sedimentary

Banded Chert (or Flint)

Microcrystalline Quartz (SiO2)

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

Chert (Black Chert/Flint)

Chert (Silicon Dioxide, SiO2)

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

Chert (Nodule)

Cryptocrystalline Silica (SiO2)

Blue Chalcedony (Silicon Dioxide (SiO2)) — mineral

Blue Chalcedony

Silicon Dioxide (SiO2)

Banded Sandstone (Liesegang Rings) (Sedimentary Arenite (SiO2 with FeO/Fe2O3 impurities)) — sedimentary

Banded Sandstone (Liesegang Rings)

Sedimentary Arenite (SiO2 with FeO/Fe2O3 impurities)

Jasper with Quartz Vein (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Jasper with Quartz Vein

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Jasper with Quartz Veining (Silicon Dioxide (SiO2) with impurities) — sedimentary

Jasper with Quartz Veining

Silicon Dioxide (SiO2) with impurities

Petrified Wood (Silicified Wood (SiO2)) — metamorphic

Petrified Wood

Silicified Wood (SiO2)

Banded Chalcedony (Agate) (Chalcedony (SiO2) - Cryptocrystalline Quartz) — mineral

Banded Chalcedony (Agate)

Chalcedony (SiO2) - Cryptocrystalline Quartz

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

Yellow Agate (Chalcedony (cryptocrystalline Quartz), SiO2) — mineral

Yellow Agate

Chalcedony (cryptocrystalline Quartz), SiO2

Blue Chalcedony (Chalcedony (Silicon Dioxide, SiO2)) — mineral

Blue Chalcedony

Chalcedony (Silicon Dioxide, SiO2)

Sandstone (Yellow/Tan) (Clastic sedimentary rock (primarily SiO2 with iron oxide staining)) — sedimentary

Sandstone (Yellow/Tan)

Clastic sedimentary rock (primarily SiO2 with iron oxide staining)

Banded Chert (with Quartz Vein) (Microcrystalline Silica (SiO2)) — sedimentary

Banded Chert (with Quartz Vein)

Microcrystalline Silica (SiO2)

Red Jasper (possibly Petrified Wood) (Silicon Dioxide (SiO2) with Hematite inclusions) — sedimentary (secondary formation)

Red Jasper (possibly Petrified Wood)

Silicon Dioxide (SiO2) with Hematite inclusions

sedimentary (secondary formation)

Chert (Field-collected specimen) (Chert (Crystalline Silica, SiO2)) — sedimentary

Chert (Field-collected specimen)

Chert (Crystalline Silica, SiO2)

Petrified Wood (Silicified Wood (SiO2)) — mineral

Petrified Wood

Silicified Wood (SiO2)

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

Chert (Jasper/Flint variant)

Silicon Dioxide (SiO2)

Blue Chalcedony (Silicon Dioxide (SiO2)) — mineral

Blue Chalcedony

Silicon Dioxide (SiO2)

Quartzite with Quartz Veining (Quartzite (primarily SiO2)) — metamorphic

Quartzite with Quartz Veining

Quartzite (primarily SiO2)

Quartz Vein in Sandstone (Sandstone with Hydrothermal Quartz (SiO2)) — sedimentary

Quartz Vein in Sandstone

Sandstone with Hydrothermal Quartz (SiO2)

Chert (variant of Flint) (Chert (SiO2)) — Sedimentary

Chert (variant of Flint)

Chert (SiO2)

Quartz (likely) / Siliceous rock with quartz phenocrysts (if a rock fragment) (Quartz (SiO₂)) — Mineral

Quartz (likely) / Siliceous rock with quartz phenocrysts (if a rock fragment)

Quartz (SiO₂)

Banded Jasper with Hematite or Quartz (Silicon Dioxide (SiO2) with impurities) — sedimentary

Banded Jasper with Hematite or Quartz

Silicon Dioxide (SiO2) with impurities

Kambaba Jasper (Crocodile Jasper) (Stromatolite (Fossilized Algae)) — sedimentary

Kambaba Jasper (Crocodile Jasper)

Stromatolite (Fossilized Algae)

Rhodochrosite (Manganese Carbonate (MnCO3)) — mineral

Rhodochrosite

Manganese Carbonate (MnCO3)

Carnelian Agate (Chalcedony (Silicon Dioxide, SiO2)) — mineral

Carnelian Agate

Chalcedony (Silicon Dioxide, SiO2)

Agate (translucent pebble) (Silicon dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Agate (translucent pebble)

Silicon dioxide (SiO2) - Microcrystalline Quartz

Sandstone Concretion with Quartz Center (Sedimentary Clastic Rock (SiO2 matrix with Quartz core)) — sedimentary

Sandstone Concretion with Quartz Center

Sedimentary Clastic Rock (SiO2 matrix with Quartz core)

Chert / Flint (Chert (Cryptocrystalline Silica, SiO2)) — sedimentary

Chert / Flint

Chert (Cryptocrystalline Silica, SiO2)

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

Yellow Chalcedony (Agate) (Silicon Dioxide (SiO2)) — mineral

Yellow Chalcedony (Agate)

Silicon Dioxide (SiO2)

Petrified Wood (Silicified Wood) (Silicified fossil wood (SiO2)) — metamorphic

Petrified Wood (Silicified Wood)

Silicified fossil wood (SiO2)

Petrified Wood (Silicified Wood (primarily SiO2)) — sedimentary

Petrified Wood

Silicified Wood (primarily SiO2)

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

Chert (Nodule)

Silicon Dioxide (SiO2)

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

Chert (Nodule)

Chert (Silicon Dioxide, SiO2)

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

Chert (Flint)

Chert (Silicon Dioxide, SiO2)

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

Chert (Flint)

Chert (SiO2)