Sandstone (likely Arkose or Quartz Sandstone)
Clastic sedimentary rock (primarily SiO2)
Category
Browse sedimentary or igneous fragment specimens identified by the Rock Identifier community.
Sandstone (likely Arkose or Quartz Sandstone)
Clastic sedimentary rock (primarily SiO2)
Orange Calcite (Cleavage Rhomb)
Calcite (Calcium Carbonate, CaCO3)
Sandstone
Sedimentary Rock (Quartz arenite/Arkose)
Limestone
Limestone (CaCO3)
Sandstone
Sedimentary Rock (Quartz arenite / Lithic sandstone)
Sandstone (likely Siltstone)
Arenite or Siltstone (high SiO2 content)
Sandstone (lithic wacke)
Arenite / Lithic Wacke (mostly SiO2 with rock fragments)
Milky Quartz
Silicon Dioxide (SiO2)
Conglomerate
Conglomerate (Sedimentary Rock)
Fossiliferous limestone
Bioclastic carbonate rock, chiefly calcite (CaCO₃)
Chert Fossil (Pebble)
Microcrystalline Quartz (SiO2) with biogenic inclusions
Limestone
Calcite rock (CaCO3)
Sandstone
Sandstone (composed predominantly of SiO2)
Sandstone
Arenite (SiO2 based)
Sandstone Pebble
Arenite (SiO2 based)
Quartz Pebble
Silicon Dioxide (SiO2)
River cobble (Greywacke/Sandstone)
Sandstone / Greywacke
Painted River Rock
Painted Quartzite or Smooth Siltstone
Brecciated stone pebble
Breccia
Sandstone
Arenite (SiO2 principal)
Sandstone (Lithic Sandstone / Greywacke)
Sandstone (SiO2 rich clastic sedimentary rock)
Sandstone
Sandstone (Silicon dioxide, SiO2 based)
Sandstone
Arenite (typically SiO2 based)
Sandstone
Arenite (SiO2 principal)
Sandstone
Arenite (SiO2 based)
Tumbled quartz-rich stone, likely milky quartz
Quartz (SiO₂), possibly iron-stained milky quartz or quartzite
Turtle Stone / Septarian Nodule (Fragment)
Septarian Concretion (Calcite, Aragonite, and Limestone)
Chert Pebble (with fossil shell fragment)
Microcrystalline Quartz (SiO2) with Calcified Invertebrate Impression
Fossiliferous Limestone with Crinoid Stem fragment
Calcite (CaCO3) containing Crinoidea fossils
Fossiliferous Limestone
Carbonate sedimentary rock (CaCO3)
Sandstone
Clastic Sedimentary Rock
Limestone
Calcium Carbonate (CaCO3)
Sandstone
Arenite (Siliclastic Sedimentary Rock)
Sandstone
Sedimentary Clastic Rock (Quartz-rich)
Limestone
Calcium carbonate (CaCO3)
Sandstone
Arenite (SiO2 based)
Sandstone
Arenite (predominantly SiO2 quartz grains)
Flagstone (Sandstone)
Clastic Sedimentary Rock (composed of quartz and feldspar)
Sandstone
Arenite
Pumice (or Volcanic Tuff / Ash)
Pumice / Pyroclastic rock
Sandstone (Weathered Pebble)
Sedimentary Rock (Quartz arenite)
Sandstone with Dendritic Inclusions
Quartzose Sandstone