Fossilized Tooth
Vertebrate Fossilized Tooth (Mineralized Biogenic Material)
fossil
Category
Organic Gemstone (Not A Rock Or Mineral)
Browse organic gemstone (not a rock or mineral) specimens identified by the Rock Identifier community.
Learn about Organic Gemstone (Not A Rock Or Mineral) in the encyclopedia
View all →
Chert / Flint
Silicon Dioxide (SiO2)
sedimentary
Amber
Fossilized Tree Resin
gemstone
Shark Tooth Fossil
Chondrichthyes (class) fossilized tooth
fossil
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Petrified Wood
Silicified Wood (primarily SiO2)
mineral
Fossil-bearing Sedimentary Rock
Sedimentum cum fossili
fossil
Amber
Succinite (C10H16O)
mineral
Amber
Succinite (approximate formula C10H16O)
mineral
Fossiliferous Shale
Laminated Mudrock with plant fossils
sedimentary
Petrified Wood
Silicified wood (Quartz/Chalcedony - SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
mineral
Septarian Nodule
Septarian Nodule (Calcite, Aragonite, and Limestone/Claystone)
sedimentary
Granite / Feldspar gravel
Granite (felsic intrusive igneous rock)
igneous
Limestone Concretion (Botryoidal/Calcareous Nodules)
Calcium Carbonate Concretion (CaCO3)
sedimentary
Chert (Nodular or Massive Variety)
Cryptocrystalline Quartz (SiO2)
sedimentary
Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Dyed Agate / Quartz (Tumbled)
Silicon Dioxide (SiO2) with artificial dye
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Banded Agate (Dyed)
SiO2 (Silicon Dioxide / Microcrystalline Quartz)
mineral
Jasper
Silicon Dioxide (Microcrystalline Quartz, $SiO_2$)
sedimentary
Agatized Petrified Wood
Silicon Dioxide (SiO2) - Chalcedony pseudomorph after Wood
metamorphic
Sandstone
Sandstone (Quartz-rich Arenite / SiO2)
sedimentary
Amber
Succinite (specifically for Baltic amber); Chemical formula approximately C10H16O
mineral
Amber
Fossilized Tree Resin (C10H16O)
gemstone
Pearl
Calcium Carbonate (Aragonite/Calcite) with Conchiolin (CaCO3)
mineral
Sandstone with Iron Staining
Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)
sedimentary
Concrete or asphalt-like aggregate surface with a dark fragment
Uncertain; likely artificial concrete containing mixed lithic aggregate, not a natural rock
sedimentary
Chert (Jasper-rich)
Silicon Dioxide (SiO2)
sedimentary
Chert (Polished/Tumbled)
Silicon Dioxide (SiO2)
sedimentary
Fire Opal
Hydrated Silica (SiO2·nH2O)
mineral
Amber
Succinite (Formula: C10H16O)
Mineraloid
Pyrite in Slate or Shale
Iron Sulfide (FeS2) in Argillaceous Matrix
mineral
Tree Agate
Dendritic Agate (Silicon Dioxide, SiO2 with chlorite inclusions)
mineral
Amber
Succinite (Resinous fossilized tree sap)
Mineraloid
Natural Pearl (appearing in a jewelry setting)
Calcium Carbonate (mostly Aragonite), CaCO3 with Conchiolin
mineral
Pearl and Garnet Glass
Calcium Carbonate (CaCO3) for pearl; Silicon Dioxide (SiO2) for glass
mineral and glass
Sandstone
Sandstone (principally SiO2/Silicon Dioxide)
sedimentary
Sandstone (Glauconitic)
Glauconitic Quartz Sandstone (SiO2 + (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2)
sedimentary
Petrified Wood
Silicified Wood (primarily Quartz/Chalcedony, SiO2)
fossil
Quartz
Silicon Dioxide (SiO2)
mineral