Yellow Jasper
Silicon dioxide (SiO2)
sedimentary
Category
Sedimentary (Biogenic Sediment Or Biological Remain)
Browse sedimentary (biogenic sediment or biological remain) specimens identified by the Rock Identifier community.
Learn about Sedimentary (Biogenic Sediment Or Biological Remain) in the encyclopedia
View all →
Likely weathered sandstone or iron-rich chert fragment
Indeterminate; probable quartz-rich sandstone (SiO₂) with iron-oxide cement, possibly chert
sedimentary
Polished brecciated jasper (likely septarian or iron-rich jasper)
Microcrystalline quartz (chalcedony), SiO₂, with iron oxides and possibly calcite or other rock fragments
sedimentary
Rounded reddish-brown pebble
Likely ferruginous sandstone or iron-rich quartzite; exact identification requires a fresh surface and tests
sedimentary
Banded chert (likely flint)
Microcrystalline quartz/chalcedony, SiO₂
sedimentary
Chert Nodule in Limestone (Flint in Chalk)
SiO2 (Microcrystalline Quartz) in CaCO3 (Calcite)
sedimentary
Concretion with Geode Cavity
Ferruginous Sandstone Concretion with Quartz Center
sedimentary
Red Jasper
SiO2 (Silicon Dioxide) with Iron oxides
sedimentary
Siderite Concretion (Nodule)
Iron Carbonate (FeCO3) Concretion
sedimentary
Fossilized Echinoid (Sea Urchin)
Echinoidea (Class) - Often found as Micraster or Clypeaster specimens
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2)
sedimentary
Fossil Sand Dollar (Echinoidea)
Phylum Echinodermata, Class Echinoidea (likely Dendraster or Scutella)
sedimentary
Puddingstone
Conglomerate
sedimentary
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Greywacke (River Siltstone)
Lithic Wacke (Sandstone subfamily)
sedimentary
Ironstone Concretion (Limonite/Goethite)
Ferruginous Sandstone or Limonite (FeO(OH)·nH2O)
sedimentary
Fossilized Horn Coral
Rugosa
fossil
Fossilized Echinoid / Sea Urchin Internal Mold
Echinoidea internal cast (steinkern)
fossil
Chert Nodule in Limestone
Sedimentary rock comprising microcrystalline quartz (chert) and calcium carbonate (limestone)
sedimentary
Fossilized bivalve shell
Bivalvia indeterminate; likely a fossil cockle or clam shell, aragonite/calcite replaced or preserved
fossil
Fossil Coral / Petrifed Coral Agate
Silicified Anthozoa (Agatized Coral)
fossil
Fossilized Shark Tooth
Chondrichthyes tooth
fossil
Shark Tooth Fossil
Chondrichthyes (class) fossilized tooth
fossil
Echinoid Fossil (Sea Urchin Fossil)
Echinoidea
fossil
Painted River Rock
Artificially Coated Sedimentary Rock
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Jasper
Silicon Dioxide (SiO2) microcrystalline quartz
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint with Chalk/Calcite)
Sedimentary cryptocrystalline quartz (SiO2)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Jasper
Silicon Dioxide (SiO2) with iron oxide impurities
sedimentary
Banded Chert (Jasper)
Silicon Dioxide (SiO2)
sedimentary
Banded Chert
Cryptocrystalline Quartz (SiO2)
sedimentary
Gravel and Pebbles
Unconsolidated rock fragments / detrital sediment
sedimentary
Sand
Siliciclastic sediment / Quartz sand (SiO2)
sedimentary
Gravel and River Pebbles
Unconsolidated rock fragments / Detrital sediment
sedimentary
Gravel
Unconsolidated rock fragments / detrital sediment
sedimentary
Fossil Shark Tooth
Otodus sp. (Eocene shark fossil)
fossil
Red Sandstone / Quartzite Pebble
Quartz Arenite / Quartzite
sedimentary
Banded Sandstone (River Pebble)
Clastic Sedimentary Rock (primarily Quartzite and Feldspar grains)
sedimentary
Fossil brachiopod or bivalve shell
Likely a fossilized brachiopod; precise genus cannot be determined from the photograph
fossil
Fossilized Shark Tooth
Chondrichthyes (Class)
fossil