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

Chert (Agatized Chert)

Microcrystalline Quartz (SiO2)

Brecciated Jasper (Silicon Dioxide (SiO2) with iron impurities) — sedimentary

Brecciated Jasper

Silicon Dioxide (SiO2) with iron impurities

Banded chert or jasper pebble (Microcrystalline quartz (SiO₂), commonly with iron-oxide and clay impurities) — sedimentary

Banded chert or jasper pebble

Microcrystalline quartz (SiO₂), commonly with iron-oxide and clay impurities

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

Chert (Jasper variety)

Microcrystalline Quartz (SiO2)

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

Chert (variant of Flint)

Chert (SiO2)

Chert (with Patina) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (with Patina)

Microcrystalline Quartz (SiO2)

Banded Iron Formation (BIF) or similar banded sedimentary rock (Banded Iron Formation) — sedimentary

Banded Iron Formation (BIF) or similar banded sedimentary rock

Banded Iron Formation

Brown stone, likely a weathered chert or iron-stained rock (Unidentified brown lithic specimen; composition cannot be determined from the image) — sedimentary

Brown stone, likely a weathered chert or iron-stained rock

Unidentified brown lithic specimen; composition cannot be determined from the image

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

Chert (specifically Banded Chert or Flint)

Microcrystalline Quartz (SiO2)

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

Chert (White Chert/Flint)

Microcrystalline Quartz (SiO2)

Chert / Flint (Cryptocrystalline quartz (SiO2)) — Sedimentary

Chert / Flint

Cryptocrystalline quartz (SiO2)

Polished dark pebble, possibly basalt or chert (Uncertain; likely fine-grained basalt (plagioclase–pyroxene) or microcrystalline silica (chert)) — igneous

Polished dark pebble, possibly basalt or chert

Uncertain; likely fine-grained basalt (plagioclase–pyroxene) or microcrystalline silica (chert)

Chert (with Drusy Quartz Pocket) (Silicon Dioxide (SiO2)) — sedimentary

Chert (with Drusy Quartz Pocket)

Silicon Dioxide (SiO2)

Banded Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Banded Chert

Microcrystalline Quartz (SiO2)

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

Tumbled yellow jasper or chert

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

Red jasper (likely tumbled jasper/chert) (Microcrystalline quartz, SiO₂, colored red by iron oxides; exact identification from the photo is uncertain.) — sedimentary

Red jasper (likely tumbled jasper/chert)

Microcrystalline quartz, SiO₂, colored red by iron oxides; exact identification from the photo is uncertain.

Polished brecciated jasper (likely ocean jasper or jasp-agate) (Microcrystalline quartz/chalcedony, SiO₂, with iron-oxide impurities) — mineral

Polished brecciated jasper (likely ocean jasper or jasp-agate)

Microcrystalline quartz/chalcedony, SiO₂, with iron-oxide impurities

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

Chert / Chalcedony

Silicon Dioxide (SiO2)

Chert Nodule or Concretion (Microcrystalline Quartz / Sedimentary Nodule) — sedimentary

Chert Nodule or Concretion

Microcrystalline Quartz / Sedimentary Nodule

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

Chert (Jasper)

Silicon Dioxide (SiO2)

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

Chert

Chert (Microcrystalline Quartz, SiO2)

Tumbled quartz-rich pebble (Likely quartz-bearing chert or jasper; primarily microcrystalline SiO₂) — mineral

Tumbled quartz-rich pebble

Likely quartz-bearing chert or jasper; primarily microcrystalline SiO₂

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

Chert (Flint)

Chert (SiO2)

Brown chert or silicified limestone fragment (Microcrystalline quartz (SiO₂), possibly occurring as chert; exact identification requires testing) — sedimentary

Brown chert or silicified limestone fragment

Microcrystalline quartz (SiO₂), possibly occurring as chert; exact identification requires testing

Brown Marble (Metamorphic Limestone (CaCO3)) — metamorphic

Brown Marble

Metamorphic Limestone (CaCO3)

Chert (Flint) (Chert (predominantly SiO₂ - silicon dioxide)) — sedimentary

Chert (Flint)

Chert (predominantly SiO₂ - silicon dioxide)

Chert (Yellow or Tan Chert) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Yellow or Tan Chert)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (concretionary/nodular variant) (Microcrystalline Quartz (SiO2) with possible fossil or mineral inclusions) — sedimentary

Chert (concretionary/nodular variant)

Microcrystalline Quartz (SiO2) with possible fossil or mineral inclusions

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

Chert (Nodule)

Chert (Silicon dioxide, SiO2)

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

Chert (Flint)

Silicon dioxide (SiO2)

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

Chert / Chalcedony

Microcrystalline Quartz (SiO2)

Weathered brown chert or flint pebble (Microcrystalline quartz (SiO₂), likely chert/flint) — sedimentary

Weathered brown chert or flint pebble

Microcrystalline quartz (SiO₂), likely chert/flint

Banded Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Banded Chert

Microcrystalline Quartz (SiO2)

Banded Chert (Chert (a microcrystalline variety of quartz, SiO2 with minor impurities)) — Sedimentary

Banded Chert

Chert (a microcrystalline variety of quartz, SiO2 with minor impurities)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

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

Chert (Jasper)

Silicon Dioxide (SiO2)

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

Chert / Flint

Silicon Dioxide (SiO2)

Banded Chert / Agate Pebble (Silicon Dioxide (SiO2)) — sedimentary

Banded Chert / Agate Pebble

Silicon Dioxide (SiO2)

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

Chert (Black Chert/Flint)

Chert (Silicon Dioxide, SiO2)

Yellow jasper / iron-rich chert (Microcrystalline quartz (SiO₂), commonly colored by iron oxides) — sedimentary

Yellow jasper / iron-rich chert

Microcrystalline quartz (SiO₂), commonly colored by iron oxides

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

Chert (Green Chert or Jasper)

Silicon Dioxide (SiO2)

Weathered iron-rich chert or siliceous breccia (Microcrystalline quartz (SiO₂), likely with iron oxides and minor clay minerals) — sedimentary

Weathered iron-rich chert or siliceous breccia

Microcrystalline quartz (SiO₂), likely with iron oxides and minor clay minerals