Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Category
Sedimentary Like (Industrial Composite)
Browse sedimentary like (industrial composite) specimens identified by the Rock Identifier community.
Learn about Sedimentary Like (Industrial Composite) in the encyclopedia
View all →
Fossilized Shark Tooth
Carcharocles sp. or Striatolamia sp. (Phosphate/Carbonate mineralized Hydroxyapatite)
sedimentary
Ironstone Concretion / Chert Nodules
Iron-rich Sedimentary Concretion (Fe2O3 / SiO2 mix)
sedimentary
Red Sandstone
Arenite
sedimentary
Quartz with Chlorite / Greenschist
Quartz vein in Greenschist (SiO2 with Chlorite group minerals)
metamorphic
Mixed River Pebbles (Jasper, Hematite, and Quartzites)
Silicon dioxide (Jasper/Quartz) and Iron oxide (Hematite)
sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
Coral Fossil
Scleractinia (Fossilized Coral)
fossil
Sandstone
Sedimentary Rock (Quartz arenite / Lithic sandstone)
sedimentary
Sandstone
Clastic sedimentary rock (primarily Quartz)
sedimentary
Sandstone
Arenite
sedimentary
Chert (or Flint)
SiO2 (Microcrystalline Quartz)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Sandstone (likely Quartzose)
Arenite
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone (likely Siltstone)
Arenite or Siltstone (high SiO2 content)
sedimentary
Chert (Flint)
Chert (Microcrystalline Silicon Dioxide, SiO2)
sedimentary
Sandstone (with potential iron mineralization)
Arenite
sedimentary
Chert (Jasper)
Cryptocrystalline Quartz (SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Siltstone Pebble with Veining
Siltstone
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Banded Agate
Cryptocrystalline Quartz (SiO2)
mineral
Quartzite
Silica (SiO2)
metamorphic
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Ferruginous Quartz
Quartz (Silicon Dioxide, SiO2) with Iron Oxides
mineral
Olivine-bearing Basalt / Scoria
Mafic Igneous Rock (primarily (Mg, Fe)2SiO4)
igneous
Chert (Flint / Jasper / Hornstone)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (with Limestone matrix)
Microcrystalline Quartz (SiO2)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Fossilized Brachiopod
Brachiopoda (e.g., Atrypa or Rhynchonellida)
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Fossil Coral
Rugose Coral or Tabulate Coral (Phylum Cnidaria)
fossil
Conglomerate
Clastic sedimentary rock (Conglomerate)
sedimentary
Sandstone Pebble
Sandstone (primarily SiO2)
sedimentary
Black Chert River Stone
Cryptocrystalline Quartz (SiO2)
sedimentary
Fossiliferous Chert (Chert with Crinoid Stem Impression)
Chert (SiO2) with fossil Anthozoan or Crinoid columnals
sedimentary
Green Agate
Silicon Dioxide (SiO2) - Chalcedony variety
mineral
Amethyst (purple quartz)
Quartz, silicon dioxide (SiO₂), purple variety colored mainly by iron impurities and irradiation
mineral
Cockle Shell (Bivalve)
Cardiidae (Calcium Carbonate, CaCO3)
fossil
Quartz Geode
Crystalline Silicon Dioxide (SiO2) within a geode structure
mineral
Sandstone
Arenite (primarily Quartz-rich sedimentary rock)
sedimentary