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

Brown chert or flint pebble (Microcrystalline quartz (SiO₂), likely chert) — sedimentary

Brown chert or flint pebble

Microcrystalline quartz (SiO₂), likely chert

Jasper (likely brecciated or silicified jasper) (Microcrystalline quartz/chalcedony, SiO₂, colored mainly by iron oxides) — sedimentary

Jasper (likely brecciated or silicified jasper)

Microcrystalline quartz/chalcedony, SiO₂, colored mainly by iron oxides

Tumbled jasper or chert fragment (Microcrystalline quartz (SiO₂), likely jasper/chert with iron-oxide staining) — mineral

Tumbled jasper or chert fragment

Microcrystalline quartz (SiO₂), likely jasper/chert with iron-oxide staining

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

Chert (and Flint)

Silicon Dioxide (SiO2)

Chert with Jasper/Quartz Inclusions (Silicon Dioxide (SiO2)) — sedimentary

Chert with Jasper/Quartz Inclusions

Silicon Dioxide (SiO2)

Likely polished stromatolitic chert or jasper pebble (Silicified microbialite (microcrystalline quartz, SiO₂); identification is provisional from the photo) — sedimentary

Likely polished stromatolitic chert or jasper pebble

Silicified microbialite (microcrystalline quartz, SiO₂); identification is provisional from the photo

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

Chert (Flint Nodule)

Silicon Dioxide (SiO2)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

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

Chert (Jasper)

Microcrystalline Quartz (SiO2)

Banded chert or jasper (likely iron-rich jasper) (Microcrystalline quartz (SiO₂), commonly with hematite/goethite and clay impurities) — sedimentary

Banded chert or jasper (likely iron-rich jasper)

Microcrystalline quartz (SiO₂), commonly with hematite/goethite and clay impurities

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

Chert (Flint)

Silicon dioxide (SiO2)

Brown Chert (Cryptocrystalline Silica (SiO2)) — sedimentary

Brown Chert

Cryptocrystalline Silica (SiO2)

Blue-green calcite (Calcite (CaCO₃), likely copper-bearing or otherwise inclusions-colored) — mineral

Blue-green calcite

Calcite (CaCO₃), likely copper-bearing or otherwise inclusions-colored

Iron-stained quartz or chert fragment (Quartz (SiO₂), possibly microcrystalline quartz/chert with limonite staining) — mineral

Iron-stained quartz or chert fragment

Quartz (SiO₂), possibly microcrystalline quartz/chert with limonite staining

Chert (Sedimentary Rock) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Sedimentary Rock)

Silicon Dioxide (SiO2)

Jasper (Chert / Chalcedony) (Silicon Dioxide (SiO2) with Iron Oxide inclusions) — mineral

Jasper (Chert / Chalcedony)

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Polished orbicular jasper (likely ocean jasper) (Silicified microcrystalline quartz/chalcedony (SiO₂), with iron-oxide and other mineral inclusions) — gemstone

Polished orbicular jasper (likely ocean jasper)

Silicified microcrystalline quartz/chalcedony (SiO₂), with iron-oxide and other mineral inclusions

Banded chert or siliceous sedimentary rock (Microcrystalline quartz (chalcedony), SiO₂, with iron-oxide staining and possible carbonate/clay layers) — sedimentary

Banded chert or siliceous sedimentary rock

Microcrystalline quartz (chalcedony), SiO₂, with iron-oxide staining and possible carbonate/clay layers

Chert (White Chert / Flint) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (White Chert / Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

Chert (Microcrystalline silica (SiO2)) — sedimentary

Chert

Microcrystalline silica (SiO2)

Fossilized stromatolite or laminated microbial mat (Layered carbonate/chert fossil; exact taxon indeterminate from the image) — fossil

Fossilized stromatolite or laminated microbial mat

Layered carbonate/chert fossil; exact taxon indeterminate from the image

Tumbled dark stone, possibly river pebble or hematite (Uncertain; candidates include hematite (Fe₂O₃), basalt, or dark chert) — mineral

Tumbled dark stone, possibly river pebble or hematite

Uncertain; candidates include hematite (Fe₂O₃), basalt, or dark chert

Mixed Gemstones and Minerals (Mixed Silicates and Oxides (Quartz/Amethyst, Aventurine, Sodalite, Chert, Jasper)) — mineral

Mixed Gemstones and Minerals

Mixed Silicates and Oxides (Quartz/Amethyst, Aventurine, Sodalite, Chert, Jasper)

Chalcedony (Agate/Carnelian-like) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Agate/Carnelian-like)

Silicon Dioxide (SiO2)

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

Chert (Flint)

Silicon Dioxide (SiO2)

Brown chert or jasper pebble (Microcrystalline quartz (SiO₂), likely iron-oxide-bearing chert/jasper) — sedimentary

Brown chert or jasper pebble

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

Chert (Iron-stained) (Chert (SiO2)) — sedimentary

Chert (Iron-stained)

Chert (SiO2)

Chert Pebble/Nodule (Chert (a microcrystalline or cryptocrystalline sedimentary form of quartz, SiO2)) — Sedimentary

Chert Pebble/Nodule

Chert (a microcrystalline or cryptocrystalline sedimentary form of quartz, SiO2)

Stromatolite (Biogenic sedimentary structure (Stromatolite)) — fossil

Stromatolite

Biogenic sedimentary structure (Stromatolite)

Tumbled brown chert or flint (Microcrystalline quartz (SiO₂), commonly with chalcedony) — sedimentary

Tumbled brown chert or flint

Microcrystalline quartz (SiO₂), commonly with chalcedony

Flint (chert) fragment (Microcrystalline quartz (SiO₂), commonly called chert; possibly a worked flake) — sedimentary

Flint (chert) fragment

Microcrystalline quartz (SiO₂), commonly called chert; possibly a worked flake

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

Jasper (Chert)

Silicon Dioxide (SiO2)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

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

Tumbled chert or jasper pebble

Microcrystalline quartz (SiO₂), likely chert/jasper

Quartzite with inclusions or a banded chert (Quartzite or Chert) — Metamorphic or Sedimentary

Quartzite with inclusions or a banded chert

Quartzite or Chert

Metamorphic or Sedimentary

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

Chert (Flint)

Silicon Dioxide (SiO2)

Chert (Flint) (Silicon dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Chert (Flint)

Silicon dioxide (SiO2) - Microcrystalline Quartz

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

Chert (Green)

Silicon Dioxide (SiO2)

Chert Nodules (Microcrystalline Quartz (SiO2)) — sedimentary

Chert Nodules

Microcrystalline Quartz (SiO2)

Chert Breccia (Brecciated Chert (Microcrystalline Silica, SiO2)) — sedimentary

Chert Breccia

Brecciated Chert (Microcrystalline Silica, SiO2)

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

Chert (Mudstone)

Microcrystalline Quartz (SiO2)