Precious Red Coral
Corallium rubrum (Calcium Carbonate, CaCO3)
gemstone
Category
Organic (Biological Organism)
Browse organic (biological organism) specimens identified by the Rock Identifier community.
Learn about Organic (Biological Organism) in the encyclopedia
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Shale fragment
Shale (Laminated Mudstone)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Anthracite Coal
Carbon (with organic impurities)
sedimentary
Amber
Organic gemstone (Succinite)
mineral
Amber
Succinates (Organic Gemstone)
mineral
Amber
Succinite (Organic Mineraloid)
mineral
Pearl
Calcium carbonate (Aragonite/Calcite) - CaCO3
gemstone
Tumbled amber
Fossilized plant resin; commonly succinite (organic polymerized resin)
gemstone
Polished amber
Fossilized tree resin; chiefly polymerized diterpenoid resin (succinite when Baltic-type)
gemstone
Pearl
Aragonite (CaCO3 with conchiolin)
mineral
Ambergris (Geological/Organic Specimen)
Ambra grisea (Produced by Physeter macrocephalus)
organic material
Fossilized Wood / Petrified Wood
Petrified Wood (Silicified Flora)
fossil
Seashell (Cone Snail Shell)
Conus sp. (Calcium Carbonate, CaCO3)
fossil
Limestone with Gastropod Fossil
Sedimentary Calcium Carbonate (CaCO3) with Gastropoda inclusion
fossil
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Stardust (Micrometeorite)
Chondrite / Micrometeorite (Extraterrestrial Silicate)
igneous
Moss Agate
Chalcedony (SiO2) with inclusions of hornblende or chlorite
mineral
Horse Chestnut (Buckeye seed)
Aesculus hippocastanum seed
Organic (Non-geological)
Fossiliferous Limestone
Calcite (CaCO3) matrix with biogenic fragments
sedimentary
Fossiliferous Limestone
Calcium Carbonate (CaCO3) with Bioclastic inclusions
sedimentary
Travertine
Travertine (a terrestrial form of Limestone, CaCO3)
sedimentary
Fossiliferous Limestone
Calcium Carbonate (CaCO3)
sedimentary
Garden Quartz (Lodolite / Inclusion Quartz)
Quartz with inclusions (SiO2 with various mineral inclusions)
gemstone
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Polished amber
Fossilized tree resin (primarily organic polymerized diterpenes)
gemstone
Aragonite Star Cluster
Aragonite (CaCO3)
mineral
Shale with Coprolite influence
Argillaceous sedimentary rock (Shale/Mudstone)
sedimentary
Amber
Succinite (amorphous organic polymer)
mineral
Pearl
Organic Mineraloid (CaCO3 + Conchiolin)
mineral
Amber
Succinates (Organic compound: C10H16O)
mineraloid
Amber
Amber (Amorphous Organic Hydrocarbon)
mineral
Coal (most likely Bituminous or Anthracite)
Coal (organic sedimentary rock)
Sedimentary
Amber
Succinates (Organic Fossilized Resin)
mineraloid
Pearl
Calcium carbonate (CaCO3) in the form of aragonite
gemstone
Ferruginous Quartz
Silicon Dioxide (SiO2) with Hematite/Limonite impurities
mineral
Amber (Copal)
Fossilized Tree Resin
mineraloid
Manganese-coated Sandstone
Clastic sedimentary rock with Manganese Oxide (often Pyrolusite or Psilomelane)
sedimentary
Fossiliferous Limestone with Rugose Coral
Lithostrotionella (Limestone Matrix - CaCO3)
sedimentary
Knightia Fossil in Limestone
Knightia eocaena in micritic limestone
sedimentary
Pearl
Organic Mineral (CaCO3 with conchiolin)
mineral
Coquina (Fossiliferous Limestone)
Coquina (Organic Clastic Limestone)
sedimentary