Calcite (Honey Calcite and Agate)
Calcium Carbonate (CaCO3)
mineral
Category
Sedimentary Rock
Browse sedimentary rock specimens identified by the Rock Identifier community.
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Fossilized Nut / Coprolite / Concretion
Trace Fossil / Permineralized Plant Material
fossil
Sandstone
Clastic sedimentary rock (Quartz arenite)
sedimentary
Quartz-Veined Sandstone
Quartz-veined Arenite
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone
Arenite
sedimentary
Sandstone (Siltstone or Fine-grained)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone
Clastic sedimentary rock (Quartz arenite)
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Fossilized Limestone with Crinoid Stem
Carboniferous Limestone (containing Crinoidea ossicles)
fossil
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone (likely Arkose or Lithic)
Clastic sedimentary rock (SiO2 + impurities)
sedimentary
Sandstone
Quartz Arenite / Clastic Sedimentary Rock
sedimentary
Quartz Veined Siltstone
Siltstone with Quartz (SiO2) intrusion
sedimentary
Sandstone (likely Arkose or Lithic)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone (with minor quartz and possible clay components)
Clastic Sedimentary Rock (SiO2 dominated)
sedimentary
Sandstone (Glacial Cobble)
Arenite / Sedimentary Rock (primarily SiO2)
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Heart-shaped Limestone
Calcium Carbonate (CaCO3)
sedimentary
Chert (Jasper / Quartz pebble)
Microcrystalline Quartz (SiO2)
sedimentary
Red Sandstone Pebble
SiO2 with Fe2O3 (Quartz sandstone with hematite coating)
sedimentary
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Limonite (Goethite/Ironstone)
Hydrated iron oxide-hydroxide, approximately FeO(OH)·nH2O
mineral
Fossilized Bone
Petrified Bone (Fluorapatite / Calcium Phosphate replacement)
fossil
Fossilized Shark Tooth
Chondrichthyes tooth
fossil
Limestone Pebble
Calcium Carbonate (CaCO3)
sedimentary
Fossilized Shark Tooth
Chondrichthyes (Class)
fossil
Chert / Flint (Flaked Stone Tool / Projectile Point)
Microcrystalline Quartz (SiO2)
sedimentary
Fossilized Sand Dollar
Echinoidea (Clypeasteroida)
fossil
Hematite
Iron(III) oxide (Fe2O3)
mineral
Chert (Yellow Jasper/Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chert / River Pebble
Silicon Dioxide (SiO2)
sedimentary
Chert Nodules (Limonitic Chert)
Cryptocrystalline Quartz (SiO2) with Hydrated Iron Oxides
sedimentary
Chert (Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Fossiliferous Limestone
Biogenic Sedimentary Rock (Calcite, CaCO3)
sedimentary
Sandstone pebble
Clastic sedimentary rock (primarily SiO2)
sedimentary
Bivalve Fossil (Clam)
Class Bivalvia (e.g., Exogyra or Gryphaea species)
fossil
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone (with Chert/Quartzite nodules)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Conglomerate (or Breccia / Porphyry)
Clastic Sedimentary Rock (Conglomerate / Sandstone)
sedimentary
Sandstone
Quartz Arenite / Clastic Sedimentary Rock
sedimentary