Rock Identifier

Category

Organic Structure (Not A Rock)

Browse organic structure (not a rock) specimens identified by the Rock Identifier community.

Learn about Organic Structure (Not A Rock) in the encyclopedia

Bituminous Shale

Bituminous Shale

Black Shale

Oil Shale

Petrified Wood

Crocodile Jasper

Crocodile Jasper

Opalized Wood

Rock Salt

Coral Rock

Rock Gypsum

Asphalt Rock

Calc-Silicate Rock

Calc-Silicate Rock

Talc-carbonate Rock

Talc-carbonate Rock

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 (River Pebble) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (River Pebble)

Microcrystalline Quartz (SiO2)

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

Chert (variations include Flint)

Silicon Dioxide (SiO2)

Chert Arrowhead (Projectile Point) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert Arrowhead (Projectile Point)

Microcrystalline Quartz (SiO2)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

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

Chert

Chert (Microcrystalline Quartz, SiO2)

Moqui Marbles (Iron Oxide Concretion (Hematite/Goethite)) — sedimentary

Moqui Marbles

Iron Oxide Concretion (Hematite/Goethite)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

Chert / Flint (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Chert / Flint

Silicon Dioxide (SiO2) - Microcrystalline Quartz

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

Chert (often called Flint)

Microcrystalline Quartz (SiO2)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

Chert with Limestone matrix (Microcrystalline silica (SiO2) in Calcite (CaCO3) matrix) — sedimentary

Chert with Limestone matrix

Microcrystalline silica (SiO2) in Calcite (CaCO3) matrix

Chert (Tan/Brown) (Silicon Dioxide (SiO2) - Cryptocrystalline Quartz) — sedimentary

Chert (Tan/Brown)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

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

Chert (specifically Flint)

Microcrystalline Quartz (SiO2)

Chert / Flint (Chert (SiO2)) — sedimentary

Chert / Flint

Chert (SiO2)

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

Chert (Green variety)

Silicon Dioxide (SiO2)

Chert (Yellow or Brown Jasper) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Yellow or Brown Jasper)

Microcrystalline Quartz (SiO2)

Fossilized Oyster Shell (Limestone/Coquina) (Crassostrea (Fossilized Bivalve), Calcium Carbonate (CaCO3)) — sedimentary

Fossilized Oyster Shell (Limestone/Coquina)

Crassostrea (Fossilized Bivalve), Calcium Carbonate (CaCO3)

Fossiliferous Sandstone with Plant Remains (Arenite with Carbonaceous impressions (likely Paleozoic/Mesozoic Flora)) — sedimentary

Fossiliferous Sandstone with Plant Remains

Arenite with Carbonaceous impressions (likely Paleozoic/Mesozoic Flora)

Limestone (Concretionary or Tufa) (Calcium Carbonate (CaCO3)) — sedimentary

Limestone (Concretionary or Tufa)

Calcium Carbonate (CaCO3)

Petrified Wood (Silicified Wood (SiO2)) — fossil

Petrified Wood

Silicified Wood (SiO2)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

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

Chert (Jasper)

Microcrystalline Quartz (SiO2)

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

Chert (Flint)

Silicon dioxide (SiO2) - Microcrystalline Quartz

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

Chert (Flint variety) (Microcrystalline or cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Flint variety)

Microcrystalline or cryptocrystalline Quartz (SiO2)

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

Chert (often called Flint)

Silicon Dioxide (SiO2)

Glauconitic Sandstone (Greensand) (Glauconitic quartz wacke or arenite) — sedimentary

Glauconitic Sandstone (Greensand)

Glauconitic quartz wacke or arenite

Chert (often called Flint or Jasper when red) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Chert (often called Flint or Jasper when red)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

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

Chert (Flint variety)

Microcrystalline Quartz (SiO2)

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

Chert (Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

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

Chert (Pink Jasper)

Microcrystalline Quartz (SiO2)

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

Chert (Flint)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Chert (River Pebble) (Microcrystalline silica (SiO2)) — sedimentary

Chert (River Pebble)

Microcrystalline silica (SiO2)

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

Chert

Chert (Microcrystalline Quartz, SiO2)

Fossil Shark Tooth (Chondrichthyes (class)) — fossil

Fossil Shark Tooth

Chondrichthyes (class)

Fancy Jasper (Silicon dioxide (SiO2)) — sedimentary

Fancy Jasper

Silicon dioxide (SiO2)

Natural Freshwater Pearl (Calcium Carbonate (Aragonite and Calcite), CaCO3) — gemstone

Natural Freshwater Pearl

Calcium Carbonate (Aragonite and Calcite), CaCO3

Fossiliferous Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Fossiliferous Limestone

Calcium Carbonate (CaCO3)

Fossil Shark Tooth (Chondrichthyes (class)) — fossil

Fossil Shark Tooth

Chondrichthyes (class)

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

Chert (Flint pebble)

Microcrystalline Quartz (SiO2)

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

Chert (Flinty variety)

Microcrystalline Quartz (SiO2)