Green Calcite
Calcium Carbonate (CaCO3)
mineral
Category
Sedimentary (Fossilized Organic Matter)
Browse sedimentary (fossilized organic matter) specimens identified by the Rock Identifier community.
Anthracite Coal
Anthracite
metamorphic
Arid Sandy Loam
Arenosols / Regosols
sedimentary
Stardust (Micrometeorite)
Chondrite / Micrometeorite (Extraterrestrial Silicate)
igneous
Amber
Succinite (a specific high-quality amber from the Baltic)
Organic Mineraloid
Quartz Geode
Silicon Dioxide (SiO2) within a secondary sedimentary structure
sedimentary
Amber
Succinite (C10H16O)
mineral
Petrified Wood
Silicified wood (Quartz/Chalcedony replacement of organic matter)
sedimentary
Moss Agate
Chalcedony (Silicon Dioxide, SiO2) with inclusions
mineral
Moss Agate
Chalcedony (SiO2) with inclusions of manganese or iron oxides
mineral
Moss Agate
Silicon Dioxide (SiO2) with Chlorite/Oxide inclusions
mineral
Jasper (Mookaite variety likely)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Septarian Nodule (Dragon Stone)
Septarian Concretion (CaCO3 with Siderite and Calcite)
sedimentary
Septarian Nodule or Mud Crack Fossil
Septarian Nodule (Concretion)
sedimentary
Septarian Nodule (Dragon Stone)
Septarian Geode (CaCO3 + Mg + Fe)
sedimentary
Amber
Succinite (fossilized tree resin), C10H16O
Organic Gemstone
Water and Silt (Sedimentary Environment)
Suspended Sediment / H2O (dihydrogen monoxide)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
sedimentary
Fossilized Shark Tooth (Basal Bone)
Otodus sp. (Mineralized Hydroxyapatite)
sedimentary
Limonite (Iron Ore)
Limonite (Hydrated iron(III) oxide-hydroxide, FeO(OH)·nH2O)
mineral
Petrified Wood
Silicified Wood (primarily SiO₂ / Silicon Dioxide)
mineral
Mookaite Jasper
Silicified Radiolarite (SiO2)
sedimentary
Moss Agate
Chalcedony (Silicon Dioxide / SiO2)
mineral
Moss Agate
Silicon Dioxide with inclusions (SiO2)
mineral
Stromatolite (Jasper-replaced)
Fossilized Stromatolite (Cyanobacteria / Cryptozon / Silica SiO2)
sedimentary
Knightia Fossil in Limestone
Knightia eocaena in micritic limestone
sedimentary
Chert (Chert Nodule with Cortex)
Microcrystalline Quartz (SiO2)
sedimentary
Amber (with potentially inclusions)
Succinite (Fossilized Tree Resin)
Mineraloid
Anthracite Coal
Anthracite
metamorphic
Jasper (Petrified Wood variant)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Anthracite Coal
Anthracite (Highly Metamorphosed Coal)
sedimentary
Fossil Coral (Honeycomb Coral)
Favosites (extinct genus of Tabulate coral)
sedimentary
Anthracite Coal
Anthracite (Carbon-based organic sedimentary/metamorphic rock)
metamorphic
Jasper (likely Brown or Brecciated)
Jasper (Silicon Dioxide, SiO2)
sedimentary
Moss Agate
Silicon Dioxide (SiO2) with inclusions of manganese or iron oxide
mineral
Moss Agate
Chalcedony (Silicon Dioxide) with inclusions - SiO2
mineral
Moss Agate
Silicon Dioxide (SiO2) with mineral inclusions
Mineral
Crinoid Stem Fragment
Crinoid (Phylum Echinodermata, Class Crinoidea)
sedimentary
Amber (Rough Baltics/Beach Specimen)
Succinicum (Organic Gemstone - Fossilized Resin)
mineral
Green Moss Agate
Agate (Silicon Dioxide - SiO2 with inclusions of Manganese/Iron oxides)
mineral
Septarian Nodule
Septarian Concretion
sedimentary
Coal (most likely Bituminous or Anthracite)
Coal (organic sedimentary rock)
Sedimentary