Coquina
Coquina (Bioclastic Limestone)
sedimentary
Category
Sedimentary (Fossilized Organic Remain)
Browse sedimentary (fossilized organic remain) specimens identified by the Rock Identifier community.
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Sandstone (Ferruginous)
Arenite (Fe-rich)
sedimentary
Megalodon Shark Tooth Fossil
Otodus megalodon (fossilized in sedimentary matrix)
sedimentary
Crinoid Columnal Fossil
Crinoid ossicle (Class Crinoidea)
sedimentary
Crinoid Columnal
Crinoidea (Class) - Fossilized Columnal Segment
sedimentary
Sandstone (Quartz Sandstone)
Arenite (primarily SiO2)
sedimentary
Cannonball Concretion
Calcite-cemented Sandstone Concretion
sedimentary
Ammonite Fossil (Iridiscent)
Ammonoidea (subclass)
fossil
Horn Coral Fossil
Rugosa (extinct order of solitary corals)
sedimentary
Fossiliferous Limestone (Crinoidal)
Crinoid Limestone (CaCO3 with fossil biological remains)
sedimentary
Echinoid Fossil (Commonly called a Sea Urchin or Heart Urchin)
Phylum Echinodermata, Class Echinoidea
sedimentary
Red Ochre (Hematite-rich Clay)
Limonitic/Hematitic Claystone (Fe2O3 with clay minerals)
Sedimentary
Fossilized Shell in Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Chert (and Fossiliferous Chert)
Silicon Dioxide (SiO2)
sedimentary
Fossil Seashell
Invertebrate fossil (Bivalvia)
fossil
Amygdaloidal Basalt with Agate/Zeolite Amygdules
Basalt (extrusive igneous rock) containing secondary mineral fillings
igneous
Quartzite
Metamorphic Quartzite (primarily SiO2)
metamorphic
Fossilized wood fragment
Petrified wood; commonly silicified fossil wood (SiO₂ replacing organic tissue)
fossil
Quartzite with Iron Inclusions
Metamorphic Quartz (SiO2) with Hematite/Limonite
metamorphic
Chondrite Meteorite
Stony Meteorite (Chondrite)
igneous
Baltic Amber (Butterscotch variety)
Succinite
Organic Gemstone/Mineraloid
Crinoid Stem Fossil (Indian Bead)
Crinoid ossicle (Echinodermata)
fossil
Chert Nodule (Flint)
Silicon Dioxide (SiO2)
sedimentary
Red Coral
Corallium rubrum (Calcium Carbonate, CaCO3)
Organic Gemstone (Sedimentary classification)
Sandstone
Arenite
sedimentary
Shale
Shale (clastic sedimentary rock)
Sedimentary
Peanut Wood
Silicified (Petrified) Wood - SiO2 (Silicon Dioxide)
sedimentary
Fossil Coral and Quartz Pebble
Fossilized Anthozoa / Silicon Dioxide (Quartz)
sedimentary
Chert (containing a small fossil)
Microcrystalline Quartz (SiO2)
sedimentary
Mookaite Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Tiger's Eye (Rough)
SiO2 (Silicon Dioxide / Pseudomorph of Quartz after Crocidolite)
Mineral / Metamorphic
Belemnite Fossil
Belemnitida (extinct order of Cephalopods)
sedimentary
Tufa (Vesicular Limestone)
Tufa (form of Calcium Carbonate, CaCO3)
sedimentary
Fossiliferous Limestone (with Coralline Inclusions)
Calcium Carbonate (CaCO3)
sedimentary
Fossiliferous Limestone (Murchisonia/Gastropod Limestone)
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Quartzite
Quartzite (Metamorphic Quartz Sandstone)
metamorphic
Quartzite
Metamorphic Quartzite
metamorphic
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Blue Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Yellow Quartzite (Onyx Pebble)
Silicon Dioxide (SiO2) - Quartzite
metamorphic
Fossilized Coral (Petoskey Stone or similar)
Hexagonaria percarinata (Fossilized Rugose Coral)
sedimentary
Blue Chalcedony
Silicon Dioxide (SiO2) - Microcrystalline Quartz
mineral