Amber / Copal
Organic resin, C10H16O
mineral
Category
Organic (Biological Organism)
Browse organic (biological organism) specimens identified by the Rock Identifier community.
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Pearl
Calcium carbonate (Aragonite/Calcite) - CaCO3
gemstone
Pearl
Aragonite (CaCO3 with conchiolin)
mineral
Seashell (Cone Snail Shell)
Conus sp. (Calcium Carbonate, CaCO3)
fossil
Anthracite Coal
Carbon (with organic impurities)
sedimentary
Amber
Organic gemstone (Succinite)
mineral
Amber
Succinates (Organic Gemstone)
mineral
Amber
Succinite (Organic Mineraloid)
mineral
Limestone with Gastropod Fossil
Sedimentary Calcium Carbonate (CaCO3) with Gastropoda inclusion
fossil
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Fossiliferous Limestone
Calcium Carbonate (CaCO3) with Bioclastic inclusions
sedimentary
Stardust (Micrometeorite)
Chondrite / Micrometeorite (Extraterrestrial Silicate)
igneous
Moss Agate
Chalcedony (SiO2) with inclusions of hornblende or chlorite
mineral
Fossiliferous Limestone
Calcite (CaCO3) matrix with biogenic fragments
sedimentary
Travertine
Travertine (a terrestrial form of Limestone, CaCO3)
sedimentary
Fossiliferous Limestone
Calcium Carbonate (CaCO3)
sedimentary
Fossilized Wood / Petrified Wood
Petrified Wood (Silicified Flora)
fossil
Garden Quartz (Lodolite / Inclusion Quartz)
Quartz with inclusions (SiO2 with various mineral inclusions)
gemstone
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Horse Chestnut (Buckeye seed)
Aesculus hippocastanum seed
Organic (Non-geological)
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
Ferruginous Quartz
Silicon Dioxide (SiO2) with Hematite/Limonite impurities
mineral
Aragonite Star Cluster
Aragonite (CaCO3)
mineral
Shale with Coprolite influence
Argillaceous sedimentary rock (Shale/Mudstone)
sedimentary
Amber (Copal)
Fossilized Tree Resin
mineraloid
Limestone
Sedimentary rock composed primarily of Calcium Carbonate (CaCO3)
sedimentary
Glauconitic Sandstone
Glauconitic Sandstone (Greensand)
sedimentary
Ambergris (Geological/Organic Specimen)
Ambra grisea (Produced by Physeter macrocephalus)
organic material
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
Amber
Succinite (Fossilized Tree Resin)
fossil
Amber (with potentially inclusions)
Succinite (Fossilized Tree Resin)
Mineraloid
Shale
Fissile mudstone (primarily clay minerals and silt-sized quartz)
sedimentary
Druzy Quartz on Vesicular Basalt
Silicon Dioxide (SiO2) in an extrusive Mafic igneous host rock
igneous
Mother of Pearl (Nacre) / Shell Fragment
Biogenic Calcium Carbonate (Aragonite and Conchiolin)
fossil
Fossiliferous Limestone (Hash)
Bioclastic Grainstone / Calcarenite
fossil