Amber (Sumatran / Indonesian Red Blue)
Succinum (Fossilized Tree Resin)
fossil
Category
Sedimentary (Fossilized Organic Matter)
Browse sedimentary (fossilized organic matter) specimens identified by the Rock Identifier community.
Learn about Sedimentary (Fossilized Organic Matter) in the encyclopedia
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Petoskey Stone
Hexagonaria percarinata
fossil
Shark Tooth Fossil
Chondrichthyes fossil
fossil
Sandstone
Sandstone (various mineral compositions)
Sedimentary
Fulgurite
Lechatelierite (Fused Silica)
mineral
Fossilized Shark Tooth (Cretaceous to Neogene)
Elasmobranchii dental fossil (likely Squalicorax or similar species)
mineral (biogenic replacement)
Pyrite
Iron Disulfide (FeS2)
mineral
Amber (Baltic)
Succinith (Fossilized Tree Resin)
mineraloid
Fossiliferous Chert (Gryphaea Fossil)
Silicon Dioxide (SiO2) with Calcitic Mollusk Remnants
sedimentary
Fossilized Tabulate Coral (Honeycomb Coral)
Favosites (Order: Tabulata)
sedimentary
Fossilized Coral (Petoskey Stone / Favosites)
Favosites (extinct genus of tabulate coral)
sedimentary
Gastropod Steinkern (Fossilized Snail Cast)
Phylum Mollusca, Class Gastropoda (Commonly CaCO3 or SiO2 after replacement)
Sedimentary
Petoskey Stone (Weathered/Rough Form)
Hexagonaria percarinata
fossil
Petoskey Stone
Hexagonaria percarinata
fossil
Obsidian and Fossilized Shark Tooth
Obsidian (Volcanic Glass) and Otodus sp. (Fossilized shark tooth)
igneous and fossil
Petoskey Stone
Hexagonaria percarinata
fossil
Fossilized Tabulate Coral (Honeycomb Coral)
Favosites (Order: Tabulata)
sedimentary
Slag
Ferrous Slag (Amorphous calcium-magnesium-aluminum silicates)
igneous (artificial/anthropogenic)
Tree agate (dendritic agate)
Microcrystalline quartz (SiO₂) with manganese- or iron-oxide dendrites
mineral
Petoskey Stone
Hexagonaria percarinata
fossil
Milky Quartz with Dendritic Inclusions
Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions
mineral
Shale with Iron Staining
Fissile Mudrock (Sedimentary Rock)
sedimentary
Fossilized Sea Urchin (Echinoid)
Echinoidea (Class); commonly Clypeasteroida for sand dollar types
sedimentary (fossil)
Ammonite Fossil
Ammonoidea
fossil
Sandstone with trace fossil
Sandstone, possibly with Skolithos or similar trace fossil
sedimentary
Fossilized Rugose Coral (Horn Coral)
Order Rugosa
fossil
Quartzite Cobble
Quartzite (SiO2)
metamorphic
Anthracite Coal
Anthracite (a form of coal, primarily carbon)
sedimentary
Fossil Coral (Petoskey Stone / Rugose Coral)
Hexagonaria percarinata (or similar fossilized rugose/tabulate coral)
fossil
Polished tree agate (likely)
Chalcedony (microcrystalline SiO₂) with green dendritic/inclusion minerals
mineral
Coral Fossil
Anthozoa (Scleractinia)
fossil
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Tiger's Eye
Titanium-containing Quartz (Silica: SiO2)
Mineral
Sedimentary Sandstone
Arenite (Sedimentary Rock)
sedimentary
Fulgurite
Fulgurite (Lechatelierite), amorphous SiO2
metamorphic
Fossil Coral
Anthozoa (Scleractinia)
fossil
Pearl
Aragonite (CaCO3) with Conchiolin
mineral
Amber
Succinates
mineraloid
Anthracite Coal
Anthracite
metamorphic
Fossil Shark Tooth
Carcharocles or Lamniformes (order)
fossil
Peanut Wood
Petrified Wood (Silicified Araucaria with Teredo boreholes)
fossil
Fossiliferous Limestone with Rugose Coral
Calcite (CaCO3) matrix containing Rugosa (order of extinct solitary and colonial corals)
sedimentary