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

Chert (Yellow and Red Jasper) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Yellow and Red Jasper)

Microcrystalline Quartz (SiO2)

Iron-rich brown stone, possibly weathered chert or ironstone (Undetermined; likely iron-oxide-bearing silica-rich rock (chert/ironstone)) — sedimentary

Iron-rich brown stone, possibly weathered chert or ironstone

Undetermined; likely iron-oxide-bearing silica-rich rock (chert/ironstone)

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

Chert (Flint)

Silicon Dioxide (SiO2)

Mixed river gravel, prominently iron-stained chert/jasper (Microcrystalline quartz (SiO₂), chiefly chert/jasper with iron-oxide staining; mixed clasts may include quartzite and other silicates) — sedimentary

Mixed river gravel, prominently iron-stained chert/jasper

Microcrystalline quartz (SiO₂), chiefly chert/jasper with iron-oxide staining; mixed clasts may include quartzite and other silicates

Druzy Quartz on Chert/Siltstone (Silicon Dioxide (SiO2) on Microcrystalline Silica/Siltstone matrix) — sedimentary

Druzy Quartz on Chert/Siltstone

Silicon Dioxide (SiO2) on Microcrystalline Silica/Siltstone matrix

Chert (Green variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Green variety)

Microcrystalline Quartz (SiO2)

Chert Nodule (Chert / Microcrystalline Quartz (SiO2)) — sedimentary

Chert Nodule

Chert / Microcrystalline Quartz (SiO2)

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

Chert / Flint

Silicon Dioxide (SiO2)

Polished brown chert or jasper pebble (Microcrystalline quartz (SiO₂), likely ferruginous chert/jasper) — sedimentary

Polished brown chert or jasper pebble

Microcrystalline quartz (SiO₂), likely ferruginous chert/jasper

Mixed polished river stones (Likely quartz, quartzite, chert/jasper, and possibly limestone or marble) — mineral

Mixed polished river stones

Likely quartz, quartzite, chert/jasper, and possibly limestone or marble

Chert (Jaspery variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jaspery variety)

Microcrystalline Quartz (SiO2)

Chert (Channery Chert (Microcrystalline Quartz)) — sedimentary

Chert

Channery Chert (Microcrystalline Quartz)

Polished brecciated jasper (Jasper, microcrystalline quartz (SiO₂), colored mainly by iron oxides) — mineral

Polished brecciated jasper

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

Chert (flint), likely a knapped fragment (Microcrystalline quartz (SiO₂), also called cryptocrystalline quartz) — sedimentary

Chert (flint), likely a knapped fragment

Microcrystalline quartz (SiO₂), also called cryptocrystalline quartz

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

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

Red Chert (Jasper)

Silicon Dioxide (SiO2)

Tumbled brown stone, likely brown jasper or iron-rich chert (Microcrystalline quartz (SiO₂), possibly hematite/goethite-bearing) — mineral

Tumbled brown stone, likely brown jasper or iron-rich chert

Microcrystalline quartz (SiO₂), possibly hematite/goethite-bearing

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

Chert (Red Jasper variant)

Microcrystalline Quartz (SiO2)

Tumbled chert (likely jasper-bearing chert) (Microcrystalline quartz; SiO₂ (chalcedony/chert)) — sedimentary

Tumbled chert (likely jasper-bearing chert)

Microcrystalline quartz; SiO₂ (chalcedony/chert)

Possible dark cobble or pebble (Unidentified rock; composition cannot be determined from the image) — sedimentary

Possible dark cobble or pebble

Unidentified rock; composition cannot be determined from the image

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

Chert (Jasper/Flint Pebble)

Microcrystalline quartz (SiO2)

Brown chert or flint nodule (Microcrystalline quartz, SiO₂ (chalcedony/quartz)) — sedimentary

Brown chert or flint nodule

Microcrystalline quartz, SiO₂ (chalcedony/quartz)

Polished banded chert (Chert (microcrystalline quartz, SiO₂), likely banded jasper/chert) — sedimentary

Polished banded chert

Chert (microcrystalline quartz, SiO₂), likely banded jasper/chert

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

Tumbled yellow chert or jasper pebble

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

Chert Pebble (Microcrystalline Quartz (SiO2)) — sedimentary

Chert Pebble

Microcrystalline Quartz (SiO2)

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

Chert (Jasper/Agate variety)

Microcrystalline Quartz (SiO2)

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

Chert (Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

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

Chert (Jasper variety)

Silicon Dioxide (SiO2)

Jasper / Chert (polished) (Microcrystalline Quartz (SiO2)) — sedimentary / mineral

Jasper / Chert (polished)

Microcrystalline Quartz (SiO2)

sedimentary / mineral

Rounded quartz-rich pebble, likely quartzite or chert (Quartzite (mostly microcrystalline SiO₂); exact identification requires hardness and acid tests) — metamorphic

Rounded quartz-rich pebble, likely quartzite or chert

Quartzite (mostly microcrystalline SiO₂); exact identification requires hardness and acid tests

Chert (or possibly Flint) (Chert (variant: Flint)) — Sedimentary

Chert (or possibly Flint)

Chert (variant: Flint)

Chert (Septarian or Nodular variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Septarian or Nodular variety)

Microcrystalline Quartz (SiO2)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

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

Chert (Jasper)

Silicon Dioxide (SiO2)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

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

Chert (Flint)

Silicon dioxide (SiO2)

Chert (Jasper-like) (SiO2 (Cryptocrystalline Quartz)) — Sedimentary

Chert (Jasper-like)

SiO2 (Cryptocrystalline Quartz)

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

Chert (Flint Pebbles)

Microcrystalline Quartz (SiO2)

Chert (Silicon dioxide (SiO2) - Microcrystalline quartz) — sedimentary

Chert

Silicon dioxide (SiO2) - Microcrystalline quartz

Likely weathered chert or flint nodule (Microcrystalline quartz (SiO₂), possibly chalcedony-rich chert) — sedimentary

Likely weathered chert or flint nodule

Microcrystalline quartz (SiO₂), possibly chalcedony-rich chert

Chert or flint fragment (Microcrystalline quartz (SiO₂), often with chalcedony) — sedimentary

Chert or flint fragment

Microcrystalline quartz (SiO₂), often with chalcedony

Chert (specifically Flint or Common Chert node) (Silicon Dioxide (SiO2)) — sedimentary

Chert (specifically Flint or Common Chert node)

Silicon Dioxide (SiO2)