Amber
Succinite (approximate formula C10H16O)
mineral
Category
Organic Structure (Not A Rock)
Browse organic structure (not a rock) specimens identified by the Rock Identifier community.
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Limestone (containing Fossil Mold)
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Precious Coral
Corallium rubrum (Calcium carbonate with trace carotene)
Organic gemstone / Sedimentary mineraloid
Amber
Succinate (Succinite for Baltic varieties)
mineraloid
Chert (or Petrifed Wood / Banded Flint)
Silicon Dioxide (SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
fossil
Silicified Gastropod Fossil (Agatized Fossil)
Gastropoda (Class) preserved in Chalcedony/Quartz (SiO2)
sedimentary
Amber
Succinite
Organic Mineraloid
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Amber
Succinite (fossilized tree resin)
mineraloid
Petrified Wood
Silicified Wood (SiO2)
fossil
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Amber
Succinate (Succinite for Baltic varieties)
Organic Mineraloid
Amber
Succinite (approximate formula C10H16O)
mineraloid
Fossiliferous Limestone
Fossiliferous Limestone
sedimentary
Black Pearl (Tahitian Pearl)
Aragonite / Calcite (CaCO3) with Conchiolin
mineral
Limestone Pebble
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Shale (possibly)
Shale (fine-grained clastic sedimentary rock)
sedimentary
Petrified Wood
Silicified Wood / Fossilized Wood (SiO2)
sedimentary
Amber
Succinite
mineral
Fossiliferous Kalkstein (Marl/Sandstone)
Fossiliferous calcarenite/siltstone
sedimentary
Petrified Wood
Silicified Wood (SiO2)
fossil
Petrified Wood
Silicified wood (SiO2)
fossil
Amber with Organic Inclusions
Succinite (fossilized resin)
mineraloid
Petrified Wood
Silicified Wood (SiO2 permineralization)
fossil
Mother of Pearl (Nacre)
Aragonite (CaCO3) with Organic Matrix
mineral
Man-made Synthetic Material (Not a rock or mineral)
Polyester (Polyethylene terephthalate) / Faux Fur
Synthetic / Textile
Fossiliferous Chert or Agate
Microcrystalline quartz (SiO2) with fossiliferous inclusions
sedimentary
Amber
Succinicum (Organic Gemstone - Resinite)
mineraloid
Botiroidal Chalcedony or Silicified Fossil Coral
Silicon Dioxide (SiO2) - Chalcedony / Scleractinia (if fossilized)
sedimentary
Amber
Succinite (Approximate formula: C10H16O)
mineral
Graphite
Carbon (C)
mineral
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Petrified Wood
Silicified wood (Quartz/Chalcedony/Opal replacing organic matter)
sedimentary
Tumbled amber
Amber (fossilized plant resin; commonly succinite, C10H16O)
gemstone
Chert Concretion
Microcrystalline Quartz (SiO2) in Carbonate Matrix
sedimentary
Fossilized Shark Teeth
Otodus sp. (Eocene Sand Tiger/Mackerel Shark)
fossil
Fossilized Shark Tooth
Carcharodon carcharias (fossilized) / Hydroxyapatite permineralized with silica or iron
sedimentary
Petrified Bone Pebble
Silicified Fossilized Bone
fossil
Fossilized Brachiopod or Gastropod in Chert/Limestone
Phylum Brachiopoda / Mollusca
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Petrified Wood
Silicified Wood (SiO2)
mineral