Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Category
Sedimentary (Fossilized Organic Remain)
Browse sedimentary (fossilized organic remain) specimens identified by the Rock Identifier community.
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Fossilized Coral in Chert
Anthozoa (Class) fossil in Cryptocrystalline Quartz (SiO2)
fossil
Coprolite
Coprolite (fossilized feces)
fossil
Banded Agate with Drusy Quartz
Cryptocrystalline Quartz (SiO2) with macrocrystalline Quartz
mineral
Fossilized Coral (Coquina/Limestone)
Cnidaria Anthozoa (Fossilized)
sedimentary
Fossil Coral
Scleractinia (Fossilized Hexacoral)
fossil
Shark Tooth Fossil
Carcharocles megalodon or similar fossilized shark tooth
fossil
Kambaba Jasper
Stromatolite (Fossilized Algae)
sedimentary
Sandstone / Quartzite
Sedimentary quartz arenite
sedimentary
Unakite
Unakite (Epidotized Granite)
metamorphic
Chert (specifically Novaculite or Porcelainite)
Microcrystalline to Cryptocrystalline Quartz (SiO2)
sedimentary
Fossil Shell
Phylum Mollusca (Gastropod fossil)
fossil
Fossil Shell (Bivalve)
Class Bivalvia (fossilized)
fossil
Kambaba Jasper (Crocodile Jasper)
Stromatolite (Fossilized Algae)
sedimentary
Fossilized Shark Tooth
Elasmobranchii dentition (calcium phosphate / hydroxyapatite)
fossil
Amber (Burmite)
Fossilized tree resin (Succinite variant)
Organic mineraloid
Amber
Succinite (specifically for Baltic amber); approximate formula C10H16O
Mineraloid
Amber
Succinurite (C10H16O)
mineraloid
Stromatolite fossil in Chert/Jasper
Cyanobacteria / Microcystis (fossilized)
fossil
Amber
Succinite (Carbon-based organic compound; approximate formula C10H16O)
Mineraloid
Calamites Fossil in Sandstone
Calamites (Genus) in Lithic Sandstone
sedimentary
Tumbled amber-like inclusion
Likely amber (fossilized tree resin; complex polymer), but identification is uncertain from the image
gemstone
Kambaba Jasper
Stromatolite (Fossilized Algae)
sedimentary
Kambaba Jasper
Stromatolite (Fossilized Algae)
sedimentary
Kambaba Jasper
Stromatolite (Fossilized Algae)
sedimentary
Kambaba Jasper
Stromatolite (Fossilized Algae)
sedimentary
Fossilized Coral (Petoskey-like or Favosites)
Anthozoa (Fossilized Coral)
sedimentary
Tiger's Eye (Rough)
Pseudomorph of Quartz after Crocidolite (SiO2 with FeOOH inclusions)
metamorphic
Kambaba Jasper
Stromatolite Jasper (Microcrystalline Quartz)
sedimentary
Sandstone Pebble
Arenite (SiO2 with minor mineral cements)
sedimentary
Sandstone (Ferruginous)
Arenite with Iron Oxide staining (Fe2O3)
sedimentary
Sandstone
Clastic Sedimentary Rock (composed of SiO2 grains)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Fossil Shell
Phylum Mollusca (Bivalvia or Brachiopoda)
fossil
Coprolite
Coprolite (fossilized feces)
fossil
Petoskey Stone (Fossilized Rugose Coral)
Hexagonaria percarinata
sedimentary
Amber (Simulated/Faturan Style)
Resin mix (Likely Phenolic/Celluloid if synthetic, Succinite if natural)
Organic Gemstone (not a mineral)
Amber
Succinite (C10H16O)
Mineraloid (Organic)
Mixed rock and mineral collection
Multiple specimens; visible examples may include quartz (SiO₂), amethyst (quartz), calcite (CaCO₃), and dark mafic rocks
mineral
Boxwork Siderite or Sepatarian Nodule Weathering
Siderite (FeCO3) with secondary mineralization or Boxwork Geode fragment
sedimentary
Tiger's Eye
Tiger's Eye (Pseudomorph of Quartz after Crocidolite), SiO2
Mineral
Fossilized coral (likely honeycomb or branching coral)
Fossil coral; probable Scleractinia or Tabulata, composition mainly microcrystalline CaCO₃
fossil