Rock Identifier

Category

Mineral Or Sedimentary (If Chert)

Browse mineral or sedimentary (if chert) specimens identified by the Rock Identifier community.

Learn about Mineral Or Sedimentary (If Chert) in the encyclopedia

Chert

Coal

Claystone

Shale

Marl

Black Shale

Quartzite Sandstone

Quartzite Sandstone

Banded Iron Formation

Banded Iron Formation

Sperrylite

Ironstone

Breccia

Brookite

Quartz pebble (Chert / Chalcedony) (Silicon Dioxide (SiO2)) — mineral

Quartz pebble (Chert / Chalcedony)

Silicon Dioxide (SiO2)

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

Chert (Flint Nodules)

Chert (Silicon Dioxide, SiO2)

Chert / Flint (Microcrystalline quartz (SiO2)) — sedimentary

Chert / Flint

Microcrystalline quartz (SiO2)

Chert / Flint Nodule (Cryptocrystalline quartz (SiO2)) — sedimentary

Chert / Flint Nodule

Cryptocrystalline quartz (SiO2)

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

Chert (Flint)

Silicon Dioxide (SiO2)

Chert (Jasper/Flint variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Iron-rich chert or weathered ironstone (Chert (microcrystalline quartz, SiO₂) with iron-oxide minerals) — sedimentary

Iron-rich chert or weathered ironstone

Chert (microcrystalline quartz, SiO₂) with iron-oxide minerals

Jasper / Chert (river tumbled) (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper / Chert (river tumbled)

Microcrystalline Quartz (SiO2)

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

Chert (variations include Flint)

Chert (SiO2)

Chert (often called Flint) (Chert (Microcrystalline or Cryptocrystalline Quartz, SiO2)) — sedimentary

Chert (often called Flint)

Chert (Microcrystalline or Cryptocrystalline Quartz, SiO2)

Chert (and Limestone) (Silicon Dioxide (SiO2) in Calcium Carbonate (CaCO3)) — sedimentary

Chert (and Limestone)

Silicon Dioxide (SiO2) in Calcium Carbonate (CaCO3)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

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

Chert Nodules

Chert (Silicon Dioxide, SiO2)

Iron-stained chert or silicified ironstone (Microcrystalline quartz (SiO₂), likely limonite/goethite-bearing chert) — sedimentary

Iron-stained chert or silicified ironstone

Microcrystalline quartz (SiO₂), likely limonite/goethite-bearing chert

Tumbled chert or jasper pebble (Microcrystalline quartz (SiO₂), likely iron-stained chert/jasper) — sedimentary

Tumbled chert or jasper pebble

Microcrystalline quartz (SiO₂), likely iron-stained chert/jasper

Chert (Sea-worn Pebble) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Sea-worn Pebble)

Microcrystalline Quartz (SiO2)

Chert or flint fragment (Microcrystalline quartz (SiO₂), likely iron-stained chert) — sedimentary

Chert or flint fragment

Microcrystalline quartz (SiO₂), likely iron-stained chert

Chert (Gravel / Pebble) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Gravel / Pebble)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Jasper (Banded Jasper / Chert) (Silicon Dioxide (SiO2 with iron oxide inclusions)) — sedimentary

Jasper (Banded Jasper / Chert)

Silicon Dioxide (SiO2 with iron oxide inclusions)

Chert Nodule in Limestone (Microcrystalline Quartz (SiO2) within Calcium Carbonate (CaCO3)) — sedimentary

Chert Nodule in Limestone

Microcrystalline Quartz (SiO2) within Calcium Carbonate (CaCO3)

Chalcedony (Agate / Chert) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Agate / Chert)

Silicon Dioxide (SiO2)

Chalcedony (Agate/Chert) (Chalcedony (Silicon Dioxide, SiO2)) — mineral

Chalcedony (Agate/Chert)

Chalcedony (Silicon Dioxide, SiO2)

Chert (and Fossilized Brachiopod shell) (Sedimentary Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (and Fossilized Brachiopod shell)

Sedimentary Cryptocrystalline Quartz (SiO2)

Chert (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert

Cryptocrystalline Quartz (SiO2)

Chert (Silicon dioxide (SiO2)) — sedimentary

Chert

Silicon dioxide (SiO2)

Yellow Jasper (Chert) (Silicon Dioxide (SiO2) with Iron Oxide impurities) — mineral

Yellow Jasper (Chert)

Silicon Dioxide (SiO2) with Iron Oxide impurities

Chert (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert

Cryptocrystalline Quartz (SiO2)

Chert (Microcrystalline or cryptocrystalline quartz (SiO2)) — sedimentary

Chert

Microcrystalline or cryptocrystalline quartz (SiO2)

Tumbled red jasper (Jasper, microcrystalline quartz (SiO₂) colored mainly by iron oxides) — mineral

Tumbled red jasper

Jasper, microcrystalline quartz (SiO₂) colored mainly by iron oxides

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

Chert (Jasper variety)

Silicon Dioxide (SiO2)

Red-orange jasper pebble (Jasper, microcrystalline quartz (SiO₂), colored mainly by iron oxides) — mineral

Red-orange jasper pebble

Jasper, microcrystalline quartz (SiO₂), colored mainly by iron oxides

Quartz Pebble (Chert/Chalcedony) (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble (Chert/Chalcedony)

Silicon Dioxide (SiO2)

Likely weathered quartz-rich rock fragment (Indeterminate; possibly quartz-bearing sandstone or chert with iron-oxide staining) — mineral

Likely weathered quartz-rich rock fragment

Indeterminate; possibly quartz-bearing sandstone or chert with iron-oxide staining

Yellow Quartz (Chert/Chalcedony) (Silicon Dioxide (SiO2) with iron inclusions) — mineral

Yellow Quartz (Chert/Chalcedony)

Silicon Dioxide (SiO2) with iron inclusions

Chert (likely a weathered flake) (Microcrystalline quartz (SiO₂); chert) — sedimentary

Chert (likely a weathered flake)

Microcrystalline quartz (SiO₂); chert

Yellow jasper or iron-stained chert (Microcrystalline quartz (SiO₂), commonly colored by goethite/limonite and other iron oxides) — mineral

Yellow jasper or iron-stained chert

Microcrystalline quartz (SiO₂), commonly colored by goethite/limonite and other iron oxides

Reddish-brown rounded pebble, likely iron-stained sandstone or chert (Probable quartz-rich sandstone (SiO₂), possibly ferruginous chert; exact identification requires testing) — sedimentary

Reddish-brown rounded pebble, likely iron-stained sandstone or chert

Probable quartz-rich sandstone (SiO₂), possibly ferruginous chert; exact identification requires testing

Weathered iron-rich stone, possibly sandstone or ironstone (Indeterminate; likely quartz-rich sandstone with iron-oxide cement, possibly hematite/goethite) — sedimentary

Weathered iron-rich stone, possibly sandstone or ironstone

Indeterminate; likely quartz-rich sandstone with iron-oxide cement, possibly hematite/goethite

Rounded basalt pebble (Basalt; fine-grained mafic volcanic rock composed mainly of plagioclase and pyroxene, commonly with olivine) — igneous

Rounded basalt pebble

Basalt; fine-grained mafic volcanic rock composed mainly of plagioclase and pyroxene, commonly with olivine

Chert (or Jasper) (Silicon dioxide (SiO2)) — sedimentary

Chert (or Jasper)

Silicon dioxide (SiO2)

Banded Chert (Silicon Dioxide (SiO2)) — sedimentary

Banded Chert

Silicon Dioxide (SiO2)

Chert (Nodule) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (Nodule)

Microcrystalline quartz (SiO2)