Rock Identifier

Category

Organic Material (Likely A Fruit Or Berry)

Browse organic material (likely a fruit or berry) specimens identified by the Rock Identifier community.

Learn about Organic Material (Likely A Fruit Or Berry) in the encyclopedia

Peat

Orange Obsidian

Sapropel

Bituminous Shale

Bituminous Shale

Black Shale

Lizard Skin Jasper

Petrified Wood

Amber

Jet

Limonite

Oil Shale

Tangerine Obsidian

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

Chert (Nodule)

Microcrystalline Quartz (SiO2)

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

Chert (Jasper/Chalcedony mix)

Microcrystalline Quartz (SiO2)

Chert (Flint/Jasper) (Silicon dioxide (SiO2) - Microcrystalline quartz) — sedimentary

Chert (Flint/Jasper)

Silicon dioxide (SiO2) - Microcrystalline quartz

Sandstone Concretion (Arenaceous concretion (primarily SiO2 with Fe2O3 staining)) — sedimentary

Sandstone Concretion

Arenaceous concretion (primarily SiO2 with Fe2O3 staining)

Fossil plant impression slab (Fossilized plant compression/impression; exact taxon indeterminate from the image) — fossil

Fossil plant impression slab

Fossilized plant compression/impression; exact taxon indeterminate from the image

Petrified Wood (Silicified Wood (SiO2)) — fossil

Petrified Wood

Silicified Wood (SiO2)

Jasper (Silicon dioxide (SiO2) with impurities) — sedimentary

Jasper

Silicon dioxide (SiO2) with impurities

Red Jasper (Silicon Dioxide (SiO2)) — sedimentary

Red Jasper

Silicon Dioxide (SiO2)

Green Jasper (Silicon Dioxide (SiO2)) — sedimentary

Green Jasper

Silicon Dioxide (SiO2)

Chert (Iron-stained) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Iron-stained)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Petrified Wood (Silicified Wood (SiO2)) — fossil

Petrified Wood

Silicified Wood (SiO2)

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

Chert (Jasper/Flint)

Silicon Dioxide (SiO2)

Limestone (with crushed gravel) (Limestone (Calcium Carbonate, CaCO3)) — sedimentary

Limestone (with crushed gravel)

Limestone (Calcium Carbonate, CaCO3)

Fluorite (Fluorite (CaF2)) — mineral

Fluorite

Fluorite (CaF2)

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

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

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

Chert / Flint

Chert (Microcrystalline Quartz, SiO2)

Limestone (River or Sea Cobble) (Calcium Carbonate (CaCO3)) — sedimentary

Limestone (River or Sea Cobble)

Calcium Carbonate (CaCO3)

Petrified Wood (Silicified wood (Quartz/Chalcedony replacement of Cellulose)) — fossil

Petrified Wood

Silicified wood (Quartz/Chalcedony replacement of Cellulose)

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

Chert (Chert / Flint)

Silicon Dioxide (SiO2)

Tumbled pink quartz, likely dyed (Quartz (silicon dioxide, SiO₂), probably artificially colored chalcedony or milky quartz) — mineral

Tumbled pink quartz, likely dyed

Quartz (silicon dioxide, SiO₂), probably artificially colored chalcedony or milky quartz

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

Chert (Jasper/Flint variety)

Silicon Dioxide (SiO2)

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

Chert (White Chert / Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (often called Flint or River Stone) (Microcrystalline alpha-quartz (SiO2)) — sedimentary

Chert (often called Flint or River Stone)

Microcrystalline alpha-quartz (SiO2)

Amber (Succinite (fossilized resin)) — mineral

Amber

Succinite (fossilized resin)

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

Chert (Sedimentary Rock)

Silicon Dioxide (SiO2)

Petrified Wood (Silicified wood (Quartz/Chalcedony - SiO2)) — mineral

Petrified Wood

Silicified wood (Quartz/Chalcedony - SiO2)

Amber (Succinite (C10H16O)) — mineral

Amber

Succinite (C10H16O)

Banded Chert (Cryptocrystalline Quartz (SiO2)) — sedimentary

Banded Chert

Cryptocrystalline Quartz (SiO2)

Limestone (Sedimentary rock composed mainly of calcite (CaCO3)) — sedimentary

Limestone

Sedimentary rock composed mainly of calcite (CaCO3)

Black polished stone or mineral fragment (Unidentified opaque dark mineral; possibilities include black tourmaline (schorl), obsidian, or hematite) — mineral

Black polished stone or mineral fragment

Unidentified opaque dark mineral; possibilities include black tourmaline (schorl), obsidian, or hematite

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

Chert (and Fossilized Brachiopod shell)

Sedimentary Cryptocrystalline Quartz (SiO2)

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

Chert / Flint

Silicon Dioxide (SiO2)

Fossiliferous Kalkstein (Marl/Sandstone) (Fossiliferous calcarenite/siltstone) — sedimentary

Fossiliferous Kalkstein (Marl/Sandstone)

Fossiliferous calcarenite/siltstone

Chert Pebble (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert Pebble

Cryptocrystalline Quartz (SiO2)

Moss Agate (Crescent Moon Shape) (Silicon Dioxide (SiO2) with iron/manganese inclusions) — mineral

Moss Agate (Crescent Moon Shape)

Silicon Dioxide (SiO2) with iron/manganese inclusions

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Banded Agate (specifically Moss Agate or Plume Agate variety) (Silicon Dioxide (SiO2) - Cryptocrystalline Quartz) — mineral

Banded Agate (specifically Moss Agate or Plume Agate variety)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Petrified Wood (Silicified Wood (primarily SiO2)) — sedimentary

Petrified Wood

Silicified Wood (primarily SiO2)

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

Chert (Flint)

Chert (SiO2)

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

Chert (Green variety)

Silicon Dioxide (SiO2)

Chert (Flint variety) (Chert (Cryptocrystalline Quartz, SiO2)) — sedimentary

Chert (Flint variety)

Chert (Cryptocrystalline Quartz, SiO2)

Travertine (Travertine (a terrestrial form of Limestone, CaCO3)) — sedimentary

Travertine

Travertine (a terrestrial form of Limestone, CaCO3)