Raw Agate (Chalcedony Nodule)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
mineral
Category
Sedimentary (Fossilized Organic Remain)
Browse sedimentary (fossilized organic remain) specimens identified by the Rock Identifier community.
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Limestone
Calcium Carbonate (CaCO3)
sedimentary
Kambaba Jasper
Stromatolite (fossilized algae)
sedimentary
Fossilized Coral (Petoskey Stone or similar Hexagonaria variant)
Hexagonaria percarinata (Fossilized Coral)
sedimentary
Amber
Succinite (C10H16O)
mineral
Coral Fossil
Scleractinia (Fossilized Coral)
fossil
Amber
Succinite (C10H16O)
gemstone
Fossil Shark Teeth (likely Sand Tiger Shark)
Carcharias taurus (fossilized dentition)
fossil
Fossiliferous Chert (Brachiopod/Bryozoan Fossil)
Microcrystalline quartz (SiO2) with fossil inclusions
sedimentary
Amber
Succinite (C10H16O)
Mineraloid
Amber
Succinite (Resin)
mineral
Fossil Coral (Favosites Honeycomb)
Favosites (Genus), Phylum Cnidaria, Class Anthozoa
sedimentary
Petrified Wood
Silicified Wood (SiO2)
mineral
Sandstone
Sedimentary Clastic Rock (Quartz-rich)
sedimentary
Sandstone Pebble
Arenite
sedimentary
Kambaba Jasper
Stromatolite (Fossilized Algae)
sedimentary
Sand Dollar (Fossilized or Calcium Carbonate Skeleton)
Clypeasteroida (Order)
fossil
Sandstone
Clastic sedimentary rock
sedimentary
Fossilized Shark Tooth
Chondrichthyes (Class) - likely Carcharodon or Otodus genus
fossil
Amber (Rough)
Succinite (Resinite)
gemstone
Fossil Shark Tooth
Chondrichthyes (class)
fossil
Petrified Coral (Agatized Coral)
Fossilized Anthozoa (Silicon Dioxide replacement - SiO2)
fossil
Amber
Succinite (a specific common type) or Fossilized Tree Resin (C10H16O)
Mineraloid
Agate Geode
Silicon Dioxide (SiO2) - Banded Chalcedony with Quartz
mineral
Amber
Succinite (specifically for Baltic amber); Approximate formula: C10H16O
Organic Gemstone (Mineraloid)
Calligraphy Stone
Mariam Jasper (Fossiliferous Limestone composed of Hematite and Shell remains)
sedimentary
Amber (Cherry or Red variety)
Succinite (with various trace amounts of organic compounds)
Organic Gemstone (not a rock)
Fossilized Coral (Petoskey Stone or Tabulate Coral)
Scleractinia or Tabulata (CaCO3 - Calcium Carbonate)
fossil
Mosasaur Tooth Fossil
Mosasauridae (likely Prognathodon or Plioplatecarpus)
fossil
Tiger's Eye (Tumbled)
Silicified Riebeckite (SiO2 with Iron inclusions)
mineral
Gastropod Fossil
Class Gastropoda (fossilized)
fossil
Coal
Bituminous or sub-bituminous coal (carbonaceous rock)
sedimentary
Fossilized Shark Tooth or Bone Fragment
Vertebrate Fossil (likely Carcharodon or similar genus)
fossil
Sandstone (Ferruginous)
Arenite with Iron Oxide cement
sedimentary
White Quartz Pebble
Crystalline Silicon Dioxide (SiO2)
mineral
Amber
Succiniferous fossil resin (C10H16O)
mineral
Unakite
Metamorphosed Granite (Epidotized Feldspar and Quartz)
metamorphic
Sandstone (with potential trace fossils)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Fossil-bearing limestone
Bioclastic limestone, likely containing bivalve or brachiopod impressions
fossil
Fossilized Shark Tooth
Chondrichthyes (Class)
fossil
Red Sandstone
Clastic Sedimentary Rock
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary