Fossilized Brachiopod Shell
Order Spiriferida (likely)
fossil
Category
Organic (Biological Organism)
Browse organic (biological organism) specimens identified by the Rock Identifier community.
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Fossil Shark Tooth (Sand Tiger or Mackerel Shark)
Carcharias sp. or Otodus sp. replaced by Hydroxylapatite/Calcium Carbonate
sedimentary
Orange Calcite (Iron-Stained)
Calcium Carbonate (CaCO3)
mineral
Limestone with Algal/Lichen Colonization
Calcium Carbonate (CaCO3)
sedimentary
Amber
Succinite (Fossilized Tree Resin)
fossil
Amber
Succinite (with empirical formula approximately C10H16O)
Organic Mineraloid
Fossiliferous Limestone
Calcium Carbonate (CaCO3) with Bioclastic Inclusions
sedimentary
Precious Red Coral
Corallium rubrum / Corallium japonicum
mineral (organic gemstone)
Sandstone with Algae Growth
Arenite with Chlorophyta/Lichen
sedimentary
Ironstone Concretion (Limonite/Goethite)
Goethite/Limonite concretion (FeO(OH)·nH2O)
sedimentary
Moss-covered Rock Fragment
Weathered Rock Fragment with Epilithic Growth
sedimentary
Fossiliferous Limestone
Calcium Carbonate (CaCO3) with Bioclasts
sedimentary
Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Shungite
Carbonaceous rock (primarily amorphous carbon)
Mineraloid
Agatized Fossil (Druzy Agate)
Silicon Dioxide (SiO2) replacing organic matter
sedimentary
Oak Wood (Wood Grain Pattern)
Quercus (genus)
Organic (Non-rock)
Amber
Succinite (Fossilized Tree Resin)
gemstone
Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Chert / Flint
Cryptocrystalline Quartz (SiO2)
sedimentary
Fossilized Brachiopod
Articulata (Class) / Brachiopoda (Phylum)
sedimentary
Flint in Limestone (Chert Nodule)
Sedimentary rock containing microcrystalline quartz (SiO2) within a carbonate matrix
sedimentary
Amber
Succinates (Fossilized Tree Resin)
mineraloid
Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Ambergris
Physeter macrocephalus excreta (Ambergris)
mineraloid / organic geological find
Fossiliferous Limestone
Calcium Carbonate (CaCO3) with Bioclasts
sedimentary
Brachiopod Fossil
Phylum Brachiopoda (replaced by Calcite or Silica)
sedimentary
Limestone with Lichen
Carbonate Sedimentary Rock (primarily CaCO3)
sedimentary
Amber
Succinite (Approximate formula: C10H16O)
Mineraloid
Amber (in Matrix/Shale)
Amber (Fossilized Tree Resin)
mineral
Shark Tooth Fossil
Carcharhiniformes or Lamniformes (order level fossil)
fossil
Amber
Succiniferous fossil resin (C10H16O)
mineral
Amber
Succinite
Mineraloid
Amber
Succinite (organic fossilized resin)
mineraloid
Chert with Iron Oxide Staining
Microcrystalline Quartz (SiO2) with Limonite/Goethite staining
sedimentary
Amber
Succinate (Organic Fossilized Resin)
mineraloid
Brachiopod Fossil
Phylum Brachiopoda (order potentially Spiriferida)
fossil
Amber
Succinite (approximate formula C10H16O)
mineraloid
Amber
Succinate (Succinite for Baltic varieties)
Organic Mineraloid
Amber
Succinite (approximate formula C10H16O)
mineral
Chert (Yellow Jasper variant)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Aragonite (Yellow/Honey Tumble)
Calcium Carbonate (CaCO3)
mineral
Fossilized Shark Tooth (Otodus)
Otodus sp. (calcium phosphate/hydroxylellite)
sedimentary