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 (variations include Flint) (Microcrystalline or cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (variations include Flint)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Trace Fossil (Lichenandites or Rhynie Chert Chert with Microfossils) (Trace fossil in microcrystalline quartz (SiO2)) — fossil

Trace Fossil (Lichenandites or Rhynie Chert Chert with Microfossils)

Trace fossil in microcrystalline quartz (SiO2)

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

Chert Pebble (Jasper/Quartz variety)

Microcrystalline Quartz (SiO2)

Coquina or Fossiliferous Limestone (Fossiliferous Calcarenite (CaCO3)) — sedimentary

Coquina or Fossiliferous Limestone

Fossiliferous Calcarenite (CaCO3)

Pearl (Pearl; chiefly aragonite (CaCO₃) with conchiolin) — gemstone

Pearl

Pearl; chiefly aragonite (CaCO₃) with conchiolin

Gastropod shell fragment (Calcareous mollusk shell; primarily aragonite or calcite (CaCO₃)) — fossil

Gastropod shell fragment

Calcareous mollusk shell; primarily aragonite or calcite (CaCO₃)

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

Petrified Wood

Silicified Wood (primarily SiO2)

Sandstone with Fossil Leaf Impression (Sedimentary rock (Sandstone/Siltstone matrix) with Carbonaceous film fossil) — fossil

Sandstone with Fossil Leaf Impression

Sedimentary rock (Sandstone/Siltstone matrix) with Carbonaceous film fossil

Geode (unopened) (Chert / Chalcedony Geode (SiO2)) — sedimentary

Geode (unopened)

Chert / Chalcedony Geode (SiO2)

Chert (often called Flint in this context) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (often called Flint in this context)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Amber (Succinite / Fossilized Resin (C10H16O)) — fossil

Amber

Succinite / Fossilized Resin (C10H16O)

Shale with Iron Staining (Fissile Mudrock (Sedimentary Rock)) — sedimentary

Shale with Iron Staining

Fissile Mudrock (Sedimentary Rock)

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

Chert (Flint Nodules)

Silicon dioxide (SiO2)

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

Chert (Flint)

Chert (SiO2)

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

Chert (Flint/Jasper)

Silicon Dioxide (SiO2)

Bivalve Fossil (Fossilized Shell) (Class Bivalvia (fossilized in Calcium Carbonate/Aragonite)) — fossil

Bivalve Fossil (Fossilized Shell)

Class Bivalvia (fossilized in Calcium Carbonate/Aragonite)

Ironstone Concretion (Ironstone (primarily Siderite or Limonite)) — sedimentary

Ironstone Concretion

Ironstone (primarily Siderite or Limonite)

Red Jasper with Quartz (Microcrystalline Quartz (SiO2)) — sedimentary

Red Jasper with Quartz

Microcrystalline Quartz (SiO2)

Fossil Shark Tooth (Selachii (fossilized dentition)) — fossil

Fossil Shark Tooth

Selachii (fossilized dentition)

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

Yellow Chert (Chalcedony)

Microcrystalline Quartz (SiO2)

River Cobble (Sandstone) (Arenite (primarily SiO2)) — sedimentary

River Cobble (Sandstone)

Arenite (primarily SiO2)

Amber (Succinited (fossilized tree resin)) — fossil

Amber

Succinited (fossilized tree resin)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

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

Petrified Wood

Silicified Wood (primarily SiO2)

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

Chert (Flint)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Amethyst, Aquamarine, and Pearl Ring (SiO2 (Amethyst), Be3Al2Si6O18 (Aquamarine), CaCO3 (Pearl)) — gemstone

Amethyst, Aquamarine, and Pearl Ring

SiO2 (Amethyst), Be3Al2Si6O18 (Aquamarine), CaCO3 (Pearl)

Jet (Lignite (Precursor organic rock)) — gemstone

Jet

Lignite (Precursor organic rock)

Fossilized Shark Tooth (Otodus) (Otodus obliquus) — fossil

Fossilized Shark Tooth (Otodus)

Otodus obliquus

Fossilized Shark Tooth (Chondrichthyes (class)) — fossil

Fossilized Shark Tooth

Chondrichthyes (class)

Chert (often called Flint when in chalk or limestone) (Silicon Dioxide (SiO₂)) — sedimentary

Chert (often called Flint when in chalk or limestone)

Silicon Dioxide (SiO₂)

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

Chert (Nodule)

Silicon Dioxide (SiO2)

Travertine (Tufa) (Chemical Sedimentary Rock / Travertine (CaCO3)) — sedimentary

Travertine (Tufa)

Chemical Sedimentary Rock / Travertine (CaCO3)

Pearl necklace (Pearl: biogenic calcium carbonate, primarily aragonite (CaCO₃), in a conchiolin matrix) — gemstone

Pearl necklace

Pearl: biogenic calcium carbonate, primarily aragonite (CaCO₃), in a conchiolin matrix

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

Black Flint

Chert (Microcrystalline Quartz, SiO2)

Microcrystalline Quartz (Chert/Agate) (Silicon Dioxide (SiO2)) — sedimentary

Microcrystalline Quartz (Chert/Agate)

Silicon Dioxide (SiO2)

Petrified Wood / Jasper Chert (Silicified Wood / Microcrystalline Quartz (SiO2)) — sedimentary

Petrified Wood / Jasper Chert

Silicified Wood / Microcrystalline Quartz (SiO2)

Jasper (Silicon Dioxide (Microcrystalline Quartz, $SiO_2$)) — sedimentary

Jasper

Silicon Dioxide (Microcrystalline Quartz, $SiO_2$)

Chert with Iron Inclusions (Microcrystalline Quartz (SiO2) with Hematite/Limonite) — sedimentary

Chert with Iron Inclusions

Microcrystalline Quartz (SiO2) with Hematite/Limonite

Fossil Shark Tooth (Chondrichthyes tooth fossil) — fossil

Fossil Shark Tooth

Chondrichthyes tooth fossil

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

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

Petrified Wood

Silicified Wood (primarily SiO2)

Green Jasper (Jasper (Silicates, SiO2)) — sedimentary

Green Jasper

Jasper (Silicates, SiO2)