Petoskey Stone
Hexagonaria percarinata
fossil
Category
Sedimentary (Fossil)
Browse sedimentary (fossil) specimens identified by the Rock Identifier community.
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Petrified Wood
Silicified wood (Quartz/Chalcedony replacement of Cellulose)
fossil
Fossilized Shark Teeth
Otodus sp. (Eocene Sand Tiger/Mackerel Shark)
fossil
Fossilized Shark Tooth (Fragment)
Elasmobranchii (fossilized tooth)
fossil
Petoskey Stone
Hexagonaria percarinata
fossil
Fossilized Shark Tooth (Otodus)
Otodus obliquus
fossil
Petrified Wood
Silicified Wood (primarily Quartz/Chalcedony, formula SiO2)
fossil
Fossilized Rugose Coral
Order Rugosa
fossil
Fossilized Coral
Scleractinia (Agatized or Calcite replaced)
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Petoskey Stone
Hexagonaria percarinata
fossil
Amber
Fossilized Tree Resin (Successite)
fossil
Amber
Succinite (Fossilized Tree Resin)
fossil
Petrified Wood
Silicon Dioxide (SiO2)
fossil
Fossilized Tabulate Coral in Sandstone/Limestone
Favosites (Order: Tabulata)
fossil
Amber
Succinite (fossilized tree resin)
fossil
Petrified Wood
Silicified wood (Quartz/Chalcedony replacement of organic matter)
fossil
Fossilized Shark Tooth (Anterior/Lateral)
Otodus megalodon or Carcharodon carcharias (fossilized)
fossil
Baltic Amber (Black)
Succinite (Fossilized Tree Resin)
fossil
Baltic Amber (Raw)
Succinite
fossil
Petoskey Stone (Weathered/Rough Form)
Hexagonaria percarinata
fossil
Petrified Bone Pebble
Silicified Fossilized Bone
fossil
Fossilized Brachiopod
Brachiopoda (Phylum), likely Order Spiriferida or Rhynchonellida
fossil
Fossilized Rugose Coral
Order Rugosa
fossil
Petrified Wood
Silicified Wood (primarily SiO2)
fossil
Asphalt (Bituminous pavement)
Bituminous concrete / Asphalt
Sedimentary (Anthropogenic)
Fossil Coral (Petoskey-style Rugose Coral)
Hexagonaria percarinata (Order: Rugosa)
sedimentary
Chert (Nodule)
Silicon Dioxide (SiO2)
sedimentary
River Rocks (Basalt and Sedimentary Stones)
Mafic Igneous Rock (Basalt) and Clastic Sedimentary Rock
igneous and sedimentary
Shale with Vein Infillings
Shale (a fine-grained clastic sedimentary rock). The veins could be Calcite (CaCO3), Quartz (SiO2), or other minerals.
Sedimentary Rock
Petrified Wood
Silicified Wood (SiO2)
mineral
Petrified Wood
Silicified Wood (SiO2)
mineral
River Stone (likely Mudstone or Siltstone)
Lutite (Clastic sedimentary rock composed of clay and silt-sized particles)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Probable amber fragment
Amber (fossilized plant resin; chiefly amorphous organic resin, commonly dominated by succinite)
gemstone
Fossil Coral (Petoskey Stone / Rugose Coral)
Hexagonaria percarinata (Order: Rugosa, Fossilized Calcium Carbonate CaCO3)
sedimentary
Honeycomb Coral Fossil (Petoskey-type Coral)
Favosites (Extinct Colonial Tabulate Coral), CaCO3
sedimentary
Sandstone (lithic wacke/arenite)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Chert (Smooth River Pebble)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Vesicular volcanic rock, likely pumice or scoriaceous rhyolite
Vesicular rhyolite/dacite; predominantly silica-rich volcanic glass with feldspar and quartz
igneous