Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Category
Sedimentary Or Igneous Fragment
Browse sedimentary or igneous fragment specimens identified by the Rock Identifier community.
Sandstone
Arenite (SiO2 predominantly)
sedimentary
Brecciated stone pebble
Breccia
sedimentary
Limestone Gravel
Calcium Carbonate (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Quartz Druse (on Chalcedony/Agate base)
Silicon Dioxide (SiO2)
mineral
Amber
Succinite (fossilized tree resin)
mineraloid / sedimentary organic material
Coarse Sandstone Pebble
Clastic Sedimentary Rock (Sandstone)
sedimentary
Sandstone (Pebble)
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (SiO2 principal)
sedimentary
Sandstone Pebble
Arenite (primarily SiO2)
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone (likely Arkose or Quartz Sandstone)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Concretion or Geode (unbroken)
Varied (depending on mineral composition and cementing agent). For quartz-lined geodes, the scientific name of the dominant mineral would be Quartz (SiO2). For calcite-lined geodes, Calcite (CaCO3). Concretions are often composed of cryptocrystalline quartz (chert), calcite, or iron oxides.
Sedimentary rock (specifically a concretion or possibly a geode)
Sandstone (Quartzose)
Arenite (composed primarily of SiO2)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Chert (Flint variety)
Silicon Dioxide (SiO2)
sedimentary
Coquina
Bioclastic Limestone
sedimentary
Coquina
Bioclastic Limestone
sedimentary
Green Calcite
Calcite (CaCO3)
mineral
Sandstone
Arenite (primarily SiO2)
sedimentary
Orange Calcite (Cleavage Rhomb)
Calcite (Calcium Carbonate, CaCO3)
mineral
Iron Meteorite (likely Chondrite or Iron-Nickel fragment)
Siderite (Iron Meteorite), primarily Fe-Ni (Iron-Nickel) alloy
igneous
Greywacke (likely)
Greywacke (a type of sandstone)
Sedimentary
Yellow Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Sandstone
Arenite
sedimentary
Laterite (iron-rich nodule, possibly Bauxite as a subtype)
Laterite (composed of various minerals including goethite, hematite, gibbsite, etc.)
Sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Ferruginous Sandstone
Arenite with Iron-Oxide cement (Fe2O3 · nH2O)
sedimentary
Basalt
Extrusive Mafic Igneous Rock
igneous
Sandstone
Arenite
sedimentary
Sandstone
Arenite
sedimentary
Sandstone
Arenite (SiO2 predominantly)
sedimentary
Fossiliferous Limestone
Calcium Carbonate - CaCO3
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Sandstone (Quartz-rich)
Arenite (primarily SiO2)
sedimentary
Sandstone (likely Quartz Sandstone)
Arenite (composed primarily of SiO2)
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary