Sandstone (with potential trace fossils)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Category
Sedimentary (Biogenic Sediment Or Biological Remain)
Browse sedimentary (biogenic sediment or biological remain) specimens identified by the Rock Identifier community.
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Amber
Resinite (Succinite if from the Baltic); Chemical Formula: C10H16O (approximate)
Organic Diamond/Gemstone (often associated with Sedimentary sequences)
Fossil Shark Tooth (Sand Tiger or Mackerel Shark)
Carcharias sp. or Otodus sp. replaced by Hydroxylapatite/Calcium Carbonate
sedimentary
Petoskey Stone
Hexagonaria percarinata (Fossilized Coral)
sedimentary
Bivalve Fossil (Internal Mold)
Class Bivalvia (Phylum Mollusca)
sedimentary
Coprolite
Coprolite (fossilized feces)
sedimentary
Fossiliferous Limestone (Crinoidal Limestone)
Bioclastic grainstone (CaCO3)
sedimentary
Limestone with fossil crinoid stems
Calcium Carbonate (CaCO3) containing Crinoidea fossils
sedimentary
Red Moss Agate (Jasper)
Silicon Dioxide (SiO2) with Iron Oxide inclusions
sedimentary
Amber
Succinite (with approximate formula C10H16O)
mineraloid
Fossilized Gastropod in Chert/Limestone
Internal mold of Gastropoda (Class) with CaCO3 or SiO2 mineral formula
sedimentary
Red Jasper
Silicon dioxide (SiO2) with iron oxide (Hematite) inclusions
sedimentary
Gastropod Fossil (Snail Stone or Steinkern)
Class Gastropoda (Calcium Carbonate - CaCO3 / Silica - SiO2 replacing original shell)
sedimentary
Sand Dollar Fossil (Echinoidea)
Class Echinoidea (likely order Clypeasteroida), CaCO3 (Calcite)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Hag Stone
Perforated Sedimentary Rock (typically Chert or Limestone)
sedimentary
Fossil Shell
Invertebrate fossil (Mollusca)
fossil
Fenestella Bryozoan Fossil
Fenestella (class Stenolaemata)
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Stream-Rounded Shale or Mudstone
Argillaceous sedimentary rock
sedimentary
Shale
Argillaceous Sedimentary Rock
sedimentary
Shale or Mudstone River Pebble
Argillaceous sedimentary rock
sedimentary
Limestone with Chert
Sedimentary Rock (CaCO3 with SiO2 inclusions)
sedimentary
Shale (possibly Carbonaceous or Oil Shale)
Laminated Mudstone (primarily clay minerals and quartz)
sedimentary
Shale
Shale (Sedimentary rock composed of mud/clay minerals)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
fossil
Banded Chert
Silicon Dioxide (SiO2)
sedimentary
Sandstone (River Pebble)
Arenite
sedimentary
Likely vertebra fossil or bone fragment
Indeterminate fossilized vertebra; mineralized hydroxyapatite, commonly Ca₅(PO₄)₃(OH)
fossil
Calcite
Calcium Carbonate (CaCO3)
mineral
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Tufa
Calcium carbonate (CaCO3) - Porous Limestone
sedimentary
Fossiliferous Limestone
Fossiliferous Calclutite / Bio-calcarenite (CaCO3)
sedimentary
Petrified Wood
Silicified Wood (SiO2 as Quartz/Chert/Chalcedony)
sedimentary
Petrified Wood
Silicified wood (primarily quartz, SiO2)
fossil
Limestone (Chalk / Calcite Rock)
Calcium Carbonate (CaCO3)
sedimentary
Shale (or Mudstone)
Clay mineral aggregate / Fine-grained siliciclastic sedimentary rock
sedimentary
Agatized fossil fragment, possibly silicified coral
Chalcedony (microcrystalline SiO₂) replacing carbonate fossil material
fossil
Amber
Succinite
mineraloid
Orbicular Jasper (Eye Jasper / Kambaba-like pattern)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary