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

Amber

Lizard Skin Jasper

Petrified Wood

Jet

Oil Shale

Limonite

Tangerine Obsidian

Granite Cobble (Phaneritic Felsic Intrusive Rock (Granite)) — igneous

Granite Cobble

Phaneritic Felsic Intrusive Rock (Granite)

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

Chert (Flint)

Silicon Dioxide (SiO2)

Tumbled jasper or chert (Microcrystalline quartz (SiO₂), possibly iron-bearing jasper) — mineral

Tumbled jasper or chert

Microcrystalline quartz (SiO₂), possibly iron-bearing jasper

Quartz (Milky and Smoky variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky and Smoky variety)

Silicon Dioxide (SiO2)

Sandstone (Water-worn Cobble) (Arenite (variable composition, primarily SiO2)) — sedimentary

Sandstone (Water-worn Cobble)

Arenite (variable composition, primarily SiO2)

Chert (Jasper/Flint variant) (Microcrystalline or cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper/Flint variant)

Microcrystalline or cryptocrystalline Quartz (SiO2)

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

Chert (Flint)

Chert (Silicon Dioxide, SiO2)

Chert (and Jasper pebble) (Microcrystalline Silica (SiO2)) — sedimentary

Chert (and Jasper pebble)

Microcrystalline Silica (SiO2)

Coal (likely Bituminous or Lignite) (Organic Sedimentary Rock (Carbonaceous)) — sedimentary

Coal (likely Bituminous or Lignite)

Organic Sedimentary Rock (Carbonaceous)

Jasper-bearing Quartzite River Cobble (Tectonized Quartzite with Iron-Oxide (Hematite/Limonite) Veining) — metamorphic

Jasper-bearing Quartzite River Cobble

Tectonized Quartzite with Iron-Oxide (Hematite/Limonite) Veining

Chert (River Stone) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (River Stone)

Microcrystalline Quartz (SiO2)

Sandstone (likely with Borings or Vesicular Basalt) (Clastic Sedimentary Rock (Sandstone)) — sedimentary

Sandstone (likely with Borings or Vesicular Basalt)

Clastic Sedimentary Rock (Sandstone)

Pink-and-white quartz-rich rock, likely rose quartz matrix (Quartz (SiO₂), possibly intergrown with feldspar or chalcedony) — mineral

Pink-and-white quartz-rich rock, likely rose quartz matrix

Quartz (SiO₂), possibly intergrown with feldspar or chalcedony

Quartz-rich feldspathic pebble, possibly granite or granitic gneiss (Quartz–feldspar aggregate, likely granite; dark inclusion may be biotite, hornblende, or iron-oxide staining) — igneous

Quartz-rich feldspathic pebble, possibly granite or granitic gneiss

Quartz–feldspar aggregate, likely granite; dark inclusion may be biotite, hornblende, or iron-oxide staining

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

Chert (Flint)

Chert (Silicon Dioxide, SiO2)

Banded Sedimentary Rock (Siltstone/Mudstone with concretion) (Siltstone with Ferruginous Banding) — sedimentary

Banded Sedimentary Rock (Siltstone/Mudstone with concretion)

Siltstone with Ferruginous Banding

Tumbled brown-and-white feldspar-rich stone, likely granite or quartzite (Indeterminate; probably quartz–feldspar aggregate (granite) or quartzite, with iron-oxide staining) — igneous

Tumbled brown-and-white feldspar-rich stone, likely granite or quartzite

Indeterminate; probably quartz–feldspar aggregate (granite) or quartzite, with iron-oxide staining

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

Chert (and/or Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

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

Petrified Wood

Silicified Wood (primarily SiO2)

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

Chert (Flint)

Chert (Silicon Dioxide, SiO2)

Milky quartz (Quartz (SiO₂), commonly massive or vein quartz) — mineral

Milky quartz

Quartz (SiO₂), commonly massive or vein quartz

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

Chert (White Chert/Flint)

Silicon Dioxide (SiO2)

Chert (and/or Flint) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (and/or Flint)

Microcrystalline Quartz (SiO2)

Chert (often called Flint or Jasper when pigmented) (Microcrystalline or cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (often called Flint or Jasper when pigmented)

Microcrystalline or cryptocrystalline Quartz (SiO2)

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

Chert (Flint/Chalcedony)

Microcrystalline Quartz (SiO2)

Sandstone (Quartzose) (Arenite (primarily SiO2)) — sedimentary

Sandstone (Quartzose)

Arenite (primarily SiO2)

Chert (specifically Yellow/Tan Chert) (Silicon Dioxide (SiO2)) — sedimentary

Chert (specifically Yellow/Tan Chert)

Silicon Dioxide (SiO2)

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

Chert (Black Flint)

Silicon Dioxide (SiO2)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

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

Chert (Jasper/Flint variety)

Silicon Dioxide (SiO2)

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

Chert (Flint)

Silicon Dioxide (SiO2)

Petrified Wood (Silicified Wood (SiO2)) — fossil

Petrified Wood

Silicified Wood (SiO2)

Green Jasper (Silicon Dioxide (Microcrystalline Quartz, SiO2)) — sedimentary

Green Jasper

Silicon Dioxide (Microcrystalline Quartz, SiO2)

Red Jasper (Microcrystalline Quartz (Chalcedony), SiO2) — sedimentary

Red Jasper

Microcrystalline Quartz (Chalcedony), SiO2

Petrified Wood (Fossilized Wood (silicified wood)) — fossil

Petrified Wood

Fossilized Wood (silicified wood)

Chert Pebble (Microcrystalline Quartz (SiO2)) — sedimentary

Chert Pebble

Microcrystalline Quartz (SiO2)

Mixed Quartz and Jasper Pebbles (Silicon Dioxide (SiO2)) — Mineral

Mixed Quartz and Jasper Pebbles

Silicon Dioxide (SiO2)

Red Jasper (Silicon dioxide (SiO2) with iron oxide (Fe2O3) inclusions) — sedimentary/mineral

Red Jasper

Silicon dioxide (SiO2) with iron oxide (Fe2O3) inclusions

sedimentary/mineral

Natural or Cultured Pearl (Calcium Carbonate (Aragonite and Conchiolin), CaCO3) — Mineral (Organic)

Natural or Cultured Pearl

Calcium Carbonate (Aragonite and Conchiolin), CaCO3

Mineral (Organic)

Zebra Jasper (Opaque microcrystalline Quartz (SiO2) with impurities) — sedimentary

Zebra Jasper

Opaque microcrystalline Quartz (SiO2) with impurities

Fossil Plant Impression (Calamites) (Calamites sp. (Tracheophyta: Equisetopsida)) — sedimentary

Fossil Plant Impression (Calamites)

Calamites sp. (Tracheophyta: Equisetopsida)

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)