Quartz Geode
Silicon Dioxide (SiO2) within a geode
mineral
Category
Sedimentary (Artificial)
Browse sedimentary (artificial) specimens identified by the Rock Identifier community.
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Yellow Jasper
Silicon Dioxide (SiO2) with iron impurities
mineral
Red Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Red Jasper (Tumbled)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary/mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Septarian Nodule (Dragon Stone)
Septarian Concretion (Calcite, Aragonite, and Limestone/Clay)
sedimentary
Banded Iron Formation (BIF) / Jaspilite
Banded Iron Formation (predominantly Hematite, Magnetite, and Quartz/Jasper)
sedimentary
Gastropod Fossil (Internal Mold)
Phylum Mollusca, Class Gastropoda (Steinkern)
sedimentary
Travertine
Calcium Carbonate (CaCO3)
sedimentary
Sandstone
Arenite (SiO2 principal)
sedimentary
Petrified Wood
Silicified Wood
fossil
Coal
Bituminous or sub-bituminous coal (carbonaceous rock)
sedimentary
Starfish Fossil
Asteroidea fossil
fossil
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Sandstone
Arenite
sedimentary
Limestone
Calcium carbonate (CaCO3)
sedimentary
Bivalve Fossil (Shell-bearing Sedimentary Rock)
Class Bivalvia (Phylum Mollusca) within a Calcarenite/Sandstone matrix
fossil
Sandstone
Clastic Sedimentary Rock (Quartz arenite)
sedimentary
Sandstone
Clastic sedimentary rock (Quartz arenite)
sedimentary
Sandstone (likely Arkose or Lithic)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Fossiliferous Limestone
Calcium Carbonate (CaCO3) with marine fossils
fossil
Quartz Druze on Matrix
Silicon Dioxide (SiO2)
mineral
Sandstone
Quartzose Sandstone (Sedimentary Rock)
sedimentary
Sandstone Pebble
Sedimentary Rock (Quartzose Sandstone)
sedimentary
Sandstone or Quartzite
Arenite (if sedimentary) / Quartzite (if metamorphic)
Sedimentary or Metamorphic
Mixed pebble collection, including likely flint, quartzite, and fossil material
Varied silicate rocks; visible specimen may include chert (microcrystalline SiO₂), quartzite, and a possible fossil
sedimentary
Geode
Quartz nodule / Chalcedony-lined cavity
sedimentary
Apatite
Calcium phosphate fluoride/chloride, Ca5(PO4)3(F,Cl,OH)
mineral
Apatite
Calcium phosphate fluoride/chloride, Ca5(PO4)3(F,Cl,OH)
mineral
Rodonite
Rhodonite (MnSiO3)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Galena
Lead sulfide (PbS)
mineral
Shiva Lingam
Cryptocrystalline Quartz (Jasperiod Siltstone)
sedimentary
Sandstone
Arenite (SiO2 composition primarily)
sedimentary
Fish Fossil in Limestone
Lycoptera (likely) in Micritic Limestone
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
mineral
Quartz Geode
Silicon Dioxide (SiO2) in Calcareous or Siliceous Matrix
mineral
Jasper
Silicon dioxide (SiO2)
sedimentary
Red Jasper
Silicon Dioxide with Hematite impurities (SiO2 + Fe2O3)
mineral
Fossilized Shark Tooth
Carcharocles sp. or Striatolamia sp. (Phosphate/Carbonate mineralized Hydroxyapatite)
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with iron inclusions
sedimentary
Cannonball Concretion
Calcite-cemented Sandstone Concretion
sedimentary