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.

Sandstone (Arenite (SiO2 based)) — sedimentary

Sandstone

Arenite (SiO2 based)

Sandstone Concretion (Clastic Sedimentary Concretion (primarily SiO2 with Fe2O3 cement)) — sedimentary

Sandstone Concretion

Clastic Sedimentary Concretion (primarily SiO2 with Fe2O3 cement)

Conglomerate (Conglomerate (clastic sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (clastic sedimentary rock)

Quartz (Milky Quartz) (Silicon Dioxide (SiO₂)) — mineral

Quartz (Milky Quartz)

Silicon Dioxide (SiO₂)

Conglomerate (Conglomerate (clastic sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (clastic sedimentary rock)

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

Quartzite River Rock

Quartzite (primarily SiO2)

Yellow Quartzite (Quartzite (primarily SiO2)) — metamorphic

Yellow Quartzite

Quartzite (primarily SiO2)

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

Sandstone (with Iron Staining)

Clastic Sedimentary Rock (primarily Quartz, SiO2)

Obsidian (Obsidian (Volcanic Glass; SiO2 content > 70%)) — igneous

Obsidian

Obsidian (Volcanic Glass; SiO2 content > 70%)

Sandstone (likely Quartzose Sandstone) (Arenite (SiO2 predominantly)) — sedimentary

Sandstone (likely Quartzose Sandstone)

Arenite (SiO2 predominantly)

Sandstone (Greywacke/Lithic Sandstone) (Arenite / Lithic Sandstone) — sedimentary

Sandstone (Greywacke/Lithic Sandstone)

Arenite / Lithic Sandstone

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Dendritic Opal (Opalized Chalcedony with Manganese Inclusions (SiO2 · nH2O)) — mineral

Dendritic Opal

Opalized Chalcedony with Manganese Inclusions (SiO2 · nH2O)

Sandstone (Ferruginous) (Arenite (primarily SiO2 with Fe2O3 staining)) — sedimentary

Sandstone (Ferruginous)

Arenite (primarily SiO2 with Fe2O3 staining)

Quartzite Pebble (Quartzite (primarily SiO2)) — metamorphic

Quartzite Pebble

Quartzite (primarily SiO2)

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

Chert (Nodule)

Silicon Dioxide (SiO2)

Limestone (Calcareous sedimentary rock (CaCO3)) — sedimentary

Limestone

Calcareous sedimentary rock (CaCO3)

Sandstone (Arenite (Sedimentary rock composed of sand-sized minerals or rock grains)) — sedimentary

Sandstone

Arenite (Sedimentary rock composed of sand-sized minerals or rock grains)

Que Sera Stone (Llanite) (Rhyolite Porphyry with Blue Quartz and Feldspar) — igneous

Que Sera Stone (Llanite)

Rhyolite Porphyry with Blue Quartz and Feldspar

Orange Quartzite (River Pebble) (Quartzite (primarily SiO2)) — metamorphic

Orange Quartzite (River Pebble)

Quartzite (primarily SiO2)

Quartzite (Quartzite (mostly SiO2)) — metamorphic

Quartzite

Quartzite (mostly SiO2)

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

Chert (Nodule)

Chert (Silicon Dioxide, SiO2)

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

Chert (Red Jasper)

Silicon Dioxide (SiO2)

Quartz (Milk Quartz / Massive Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milk Quartz / Massive Quartz)

Silicon Dioxide (SiO2)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Chert (specifically Red Chert / Jasper) (Silicon Dioxide (SiO2)) — sedimentary

Chert (specifically Red Chert / Jasper)

Silicon Dioxide (SiO2)

Sandstone (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone

Clastic sedimentary rock (primarily SiO2)

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

Clear Quartz / Rock Crystal

Silicon Dioxide (SiO2)

Quartzite Pebble (Quartzite (SiO2)) — metamorphic

Quartzite Pebble

Quartzite (SiO2)

Jasper (Red/Brown) (Silicon Dioxide (SiO2) with iron oxide inclusions) — sedimentary

Jasper (Red/Brown)

Silicon Dioxide (SiO2) with iron oxide inclusions

Sandstone (Ferruginous) (Arenite (SiO2 with iron oxide impurities)) — sedimentary

Sandstone (Ferruginous)

Arenite (SiO2 with iron oxide impurities)

Obsidian (Obsidian (Volcanic Glass)) — igneous

Obsidian

Obsidian (Volcanic Glass)

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

Clear Quartz Crystal

Quartz (Silicon Dioxide, SiO2)

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

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

Chert (Nodule)

Silicon Dioxide (SiO2)

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

Chert (Chalcedony)

Silicon Dioxide (SiO2)

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

Chert (and Limestone)

Silicon Dioxide (SiO2)

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

Chert (Nodule)

Silicon Dioxide (SiO2)

Yellow Quartzite (Quartzite (primarily Silicon Dioxide - SiO2)) — metamorphic

Yellow Quartzite

Quartzite (primarily Silicon Dioxide - SiO2)

Pink Quartzite (Water-worn) (Quartzite (SiO2)) — metamorphic

Pink Quartzite (Water-worn)

Quartzite (SiO2)

Banded Flint (Polished Stripe Flint) (Silicon Dioxide (SiO2) - variety of Chert) — sedimentary

Banded Flint (Polished Stripe Flint)

Silicon Dioxide (SiO2) - variety of Chert

Banded Iron Formation (BIF) / Tiger Iron (Ferruginous Chert (primarily Quartz [SiO2] and Hematite/Magnetite [Fe2O3/Fe3O4])) — metamorphic

Banded Iron Formation (BIF) / Tiger Iron

Ferruginous Chert (primarily Quartz [SiO2] and Hematite/Magnetite [Fe2O3/Fe3O4])