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

Sandstone (Arenite (SiO2 primarily)) — sedimentary

Sandstone

Arenite (SiO2 primarily)

Bicolor Quartz Pebble (Silicon Dioxide (SiO2) with mineral inclusions) — mineral

Bicolor Quartz Pebble

Silicon Dioxide (SiO2) with mineral inclusions

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

Petrified Wood

Silicified Wood (primarily SiO2)

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

Chert Nodule / Flint

Microcrystalline Quartz (SiO2)

Chert Concretion (Microcrystalline Quartz (SiO2)) — sedimentary

Chert Concretion

Microcrystalline Quartz (SiO2)

Fossiliferous Limestone (Calcium Carbonate (CaCO3) with Bioclasts) — sedimentary

Fossiliferous Limestone

Calcium Carbonate (CaCO3) with Bioclasts

Zebra Stone (Banded Chert or Limestone) (Silicon Dioxide (SiO2) with Calcium Carbonate (CaCO3) inclusions) — sedimentary

Zebra Stone (Banded Chert or Limestone)

Silicon Dioxide (SiO2) with Calcium Carbonate (CaCO3) inclusions

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

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

Petrified Wood

Silicified wood (Quartz/Chalcedony replacement of organic matter)

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

Chert (Jasper/Chalcedony mix)

Microcrystalline Quartz (SiO2)

Tonsil Stone (Tonsillolith) (Calcium phosphate / Calcium carbonate biomineral) — mineral

Tonsil Stone (Tonsillolith)

Calcium phosphate / Calcium carbonate biomineral

Chert (Field Stone) (Chert (Silicon Dioxide, SiO2)) — sedimentary

Chert (Field Stone)

Chert (Silicon Dioxide, SiO2)

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

Chert (Flint)

Chert (SiO2)

Chert (Arrowhead Artifact) (Chert (SiO2)) — sedimentary

Chert (Arrowhead Artifact)

Chert (SiO2)

Sandstone (Quartz-rich) (Arenite (Quartz Arenite)) — sedimentary

Sandstone (Quartz-rich)

Arenite (Quartz Arenite)

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Petrified Wood (Silicified Wood (SiO2)) — fossil

Petrified Wood

Silicified Wood (SiO2)

Chalcedony (Agate / Jasper Specimen) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Agate / Jasper Specimen)

Silicon Dioxide (SiO2)

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

Chert / Chalcedony

Silicon Dioxide (SiO2)

Petrified Wood / Red Jasper (Silicified wood (primarily Silicon Dioxide, SiO2)) — sedimentary

Petrified Wood / Red Jasper

Silicified wood (primarily Silicon Dioxide, SiO2)

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

Chert (Flint)

Silicon Dioxide (SiO2)

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

Chert / Flint Jasper

Microcrystalline Quartz (SiO2)

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

Chert (Jasper variety)

Microcrystalline Quartz (SiO2)

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

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Blue Lace Agate (Banded Chalcedony (SiO2)) — mineral

Blue Lace Agate

Banded Chalcedony (SiO2)

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

Chert (Flint Nodules)

Silicon Dioxide (SiO2)

Banded Chert (Silicon Dioxide (SiO2)) — sedimentary

Banded Chert

Silicon Dioxide (SiO2)

Quartz pebble in concrete (Quartz (SiO₂), embedded in Portland-cement concrete) — mineral

Quartz pebble in concrete

Quartz (SiO₂), embedded in Portland-cement concrete

Petrified Wood (Silicified Wood (mainly Quartz/Chalcedony, SiO2)) — fossil

Petrified Wood

Silicified Wood (mainly Quartz/Chalcedony, SiO2)

Chalcedony (Common Agate) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Common Agate)

Silicon Dioxide (SiO2)

Red Jasper Pebble (Opaque microcrystalline Quartz (SiO2) with Iron Oxide) — sedimentary

Red Jasper Pebble

Opaque microcrystalline Quartz (SiO2) with Iron Oxide

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

Petrified Wood

Silicified Wood (primarily SiO2)

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

Petrified Wood

Silicified Wood (primarily SiO2)

Greenstone, likely serpentine or green jasper (Serpentine-group minerals, chiefly antigorite/lizardite; possibly quartz-rich jasper) — metamorphic

Greenstone, likely serpentine or green jasper

Serpentine-group minerals, chiefly antigorite/lizardite; possibly quartz-rich jasper

Chert (often called Flint) (Microcrystalline to cryptocrystalline quartz (SiO2)) — sedimentary

Chert (often called Flint)

Microcrystalline to cryptocrystalline quartz (SiO2)

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

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

Chert (Black Chert or Flint)

Silicon Dioxide (SiO2)

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

Chert (Jasper/Chalcedony)

Microcrystalline Quartz (SiO2)

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

Chert / Quartz Pebble

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Green aventurine (likely) (Quartz variety; silicon dioxide (SiO₂) with green fuchsite mica inclusions) — mineral

Green aventurine (likely)

Quartz variety; silicon dioxide (SiO₂) with green fuchsite mica inclusions

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

Chert (Jasper-rich)

Silicon Dioxide (SiO2)

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)