Rock Identifier

Category

Organic (Biological Specimen)

Browse organic (biological specimen) specimens identified by the Rock Identifier community.

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

Chert (Flint variety)

Microcrystalline context of Quartz (SiO2)

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

Banded Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Banded Chert

Microcrystalline Quartz (SiO2)

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

Chert (Jasper variety)

Silicon Dioxide (SiO2)

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

Fossiliferous Limestone (with Crinoids)

CaCO3 (Calcium Carbonate)

Red Coral (with Hematite and Black Pearl accents) (Corallium rubrum (Calcium Carbonate, CaCO3)) — mineral

Red Coral (with Hematite and Black Pearl accents)

Corallium rubrum (Calcium Carbonate, CaCO3)

Amber (Succinite (Resin)) — mineral

Amber

Succinite (Resin)

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

Petrified Wood

Silicified Wood (primarily SiO2)

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

Petrified Wood

Silicified Wood (primarily SiO2)

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

Petrified Wood

Silicified Wood (primarily SiO2)

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

Chert (Jasper/Chalcedony)

Microcrystalline Quartz (SiO2)

Banded Chert (Sedimentary Cryptocrystalline Quartz (SiO2)) — sedimentary

Banded Chert

Sedimentary Cryptocrystalline Quartz (SiO2)

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

Banded Chert (or Flint)

Microcrystalline Quartz (SiO2)

Chert (often called Flint or Jasper) (Chert (Microcrystalline or Cryptocrystalline Silica, SiO2)) — sedimentary

Chert (often called Flint or Jasper)

Chert (Microcrystalline or Cryptocrystalline Silica, SiO2)

Shungite (Non-crystalline carbon (high-carbon metamorphic rock)) — metamorphic

Shungite

Non-crystalline carbon (high-carbon metamorphic rock)

Tree Agate (also known as Dendritic Agate) (Silicon Dioxide with inclusions (SiO2 + Mn/Fe)) — mineral

Tree Agate (also known as Dendritic Agate)

Silicon Dioxide with inclusions (SiO2 + Mn/Fe)

Chert (containing Calcite or Quartz inclusions) (Silicon Dioxide (SiO2) with varying mineral impurities) — sedimentary

Chert (containing Calcite or Quartz inclusions)

Silicon Dioxide (SiO2) with varying mineral impurities

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

Chert (Flint)

Chert (SiO2)

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

Chert (Jasper/Flint variant)

Microcrystalline Quartz (SiO2)

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

Chert (Nodule)

Microcrystalline quartz (SiO2)

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

Chert (variant Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Zebra Rock / Zebra Marble (Banded Limestone-Marble Transition) — metamorphic

Zebra Rock / Zebra Marble

Banded Limestone-Marble Transition

Coquina / Limonite-stained Limestone (Sedimentary Limestone with Iron Oxyhydroxide (FeO(OH)·nH2O)) — sedimentary

Coquina / Limonite-stained Limestone

Sedimentary Limestone with Iron Oxyhydroxide (FeO(OH)·nH2O)

Graphite (Graphite (Native Carbon), Formula: C) — Metamorphic

Graphite

Graphite (Native Carbon), Formula: C

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

Chert (Black Chert / Flint)

Silicon Dioxide (SiO2)

Amber (Succinite (specifically for Baltic amber); approximate formula C10H16O) — Mineraloid

Amber

Succinite (specifically for Baltic amber); approximate formula C10H16O

Glauconitic Sandstone (Glauconitic Sandstone with high Glauconite concentration ((K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2)) — sedimentary

Glauconitic Sandstone

Glauconitic Sandstone with high Glauconite concentration ((K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2)

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

Chert (Jasper/Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

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

Chert (Flint)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Red Jasper (Silicon Dioxide (SiO2)) — sedimentary

Red Jasper

Silicon Dioxide (SiO2)

Mosasaur Tooth Fossil (Mosasaurid vertebrate fossil (Hydroxyapatite)) — mineral

Mosasaur Tooth Fossil

Mosasaurid vertebrate fossil (Hydroxyapatite)

Banded Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Banded Chert

Microcrystalline Quartz (SiO2)

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

Chert / Flint

Silicon Dioxide (SiO2)

Red Jasper (Jasper (Silicon Dioxide, SiO2)) — sedimentary

Red Jasper

Jasper (Silicon Dioxide, SiO2)

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

Chert (Flint variety)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Chert (Iron-rich) (Silicon Dioxide (SiO2) with Hematite (Fe2O3)) — sedimentary

Chert (Iron-rich)

Silicon Dioxide (SiO2) with Hematite (Fe2O3)

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

Chert (variously Flint)

Chert (Microcrystalline or cryptocrystalline Quartz, SiO₂)

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

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Chert (varietal: Flint/Jasper mix) (Hydrous Silica (SiO2)) — sedimentary

Chert (varietal: Flint/Jasper mix)

Hydrous Silica (SiO2)

Chert with Iron Staining (Microcrystalline Quartz (SiO2)) — sedimentary

Chert with Iron Staining

Microcrystalline Quartz (SiO2)

Glauconitic Sandstone (Glauconitic Sandstone (contains (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2)) — sedimentary

Glauconitic Sandstone

Glauconitic Sandstone (contains (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2)