Rugose Coral (Horn Coral Fossil)
Order Rugosa (fossilized in limestone/chert)
sedimentary
Category
Sedimentary (Fossilized Organic Remain)
Browse sedimentary (fossilized organic remain) specimens identified by the Rock Identifier community.
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Petoskey Stone
Hexagonaria percarinata (Fossilized Rugose Coral)
sedimentary
Fossil Coral (Petoskey Stone or similar)
Hexagonaria percarinata (Fossilized Rugose Coral)
sedimentary
Petoskey Stone
Hexagonaria percarinata (Fossilized Rugose Coral)
sedimentary
Petoskey Stone
Hexagonaria percarinata (Fossilized Rugose Coral)
sedimentary
Petoskey Stone
Hexagonaria percarinata (Fossilized Rugose Coral)
sedimentary
Petoskey Stone
Hexagonaria percarinata (Fossilized Rugose Coral)
sedimentary
Kambaba Jasper (Crocodile Jasper)
Rhyolite containing Fossilized Cyanobacteria (Stromatolite)
sedimentary
Petoskey Stone
Hexagonaria percarinata (Fossilized Rugose Coral)
sedimentary
Mookaite Jasper
Silicified Radiolarite (SiO2)
sedimentary
Calligraphy Stone
Fossiliferous Stromatolite Limestone (also known as Arabic Script Stone, Miriam Stone, or Elephant Skin Jasper)
sedimentary
Fossilized Shell Fragment
Bivalvia or Gastropoda (Class) fragment
fossil
Unakite
Altered Granite (Epidotized Granite)
metamorphic
Crinoid Stem Fossil
Crinoid columnal (Echinodermata)
fossil
Amber
Fossilized tree resin
gemstone
Amber
Fossilized Tree Resin
gemstone
Amber
Fossilized Tree Resin
gemstone
Amber
Fossilized Tree Resin
gemstone
Amber
Fossilized Tree Resin
gemstone
Amber
Fossilized Tree Resin
gemstone
Amber
Fossilized Tree Resin
gemstone
Amber
Fossilized Tree Resin
gemstone
Amber
Succinite (C10H16O)
Organic Mineraloid
Fossilized Bivalve in Limestone
Class Bivalvia within Sedimentary Matrix (likely CaCO3)
fossil
Crinoid Stem Fossil
Crinoid ossicle (phylum Echinodermata)
fossil
Fossilized Bivalve Shell
Bivalvia (fossil specimen)
sedimentary
Script Stone
Calcareous Sandstone / Limestone with fossilized inclusions
sedimentary
Petoskey Stone
Hexagonaria percarinata (Fossilized colonial coral)
sedimentary
Petoskey Stone
Hexagonaria percarinata (Fossilized Rugose Coral)
sedimentary
Rugose Coral (Horn Coral)
Order Rugosa (extinct fossilized coral)
sedimentary
Fossilized Coral (Petoskey Stone type)
Hexagonaria percarinata (Fossilized Rugose Coral)
sedimentary
Petoskey Stone
Hexagonaria percarinata (Fossilized Rugose Coral)
sedimentary
Petoskey Stone
Hexagonaria percarinata (Fossilized Rugose Coral)
sedimentary
Hexagonaria (Petoskey Stone)
Hexagonaria percarinata (Fossilized Rugose Coral)
sedimentary
Petoskey Stone
Hexagonaria percarinata (Fossilized Rugose Coral)
sedimentary
Fossilized Coral (Rugose or Tabulate) or Stromatolite
Phylum Cnidaria / Stromatolithus
fossil
Fossiliferous Shale or Slate with Plant Fossils
Fossil-bearing argillaceous rock
Sedimentary/Metamorphic
Oyster shell fragment
Ostreidae shell; primarily calcite (CaCO₃)
fossil
Polished dark pebble, likely basalt
Basalt, chiefly plagioclase feldspar and pyroxene, with possible olivine or magnetite
igneous
Unakite / Red Jasper beach pebble
Altered Granite (Epidotized Feldspar and Quartz)
metamorphic
Picture Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Petoskey Stone
Hexagonaria percarinata
sedimentary